diff --git a/README.md b/README.md
index 098b94c..715eddd 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,8 @@ umutray service install
 | `umutray launchers`              | List configured launchers and their state               |
 | `umutray launch <name>`          | Launch a specific launcher (e.g. `umutray launch epic`) |
 | `umutray kill [<name>]`          | Kill one launcher, or all if no name is given           |
+| `umutray play <launcher> <game>` | Play a game with its configured overlays                |
+| `umutray games [<launcher>]`     | List configured games and their overlay flags           |
 | `umutray diagnose [<name>]`      | Health checks (one launcher or all)                     |
 | `umutray setup <name>`           | Open the graphical setup wizard for a launcher          |
 | `umutray update-proton --latest` | Install newest GE-Proton release                        |
@@ -68,6 +70,9 @@ umutray service install
 | `umutray config set …`           | Update globals (`--proton-version`, `--compat-dir`)     |
 | `umutray config add-launcher …`  | Append a new launcher (needs `--exe-path`)              |
 | `umutray config remove-launcher` | Drop a launcher (prefix on disk is left untouched)      |
+| `umutray config add-game …`      | Attach a game to a launcher (needs `--exe-path`)        |
+| `umutray config remove-game …`   | Drop a game from a launcher                             |
+| `umutray config set-game-flags …`| Per-game overlay toggles: gamemode/mangohud/gamescope   |
 | `umutray service install`        | Write + enable a `systemd --user` unit                  |
 | `umutray service uninstall`      | Stop, disable, and remove the unit                      |
 | `umutray service status`         | `systemctl --user status umutray.service`               |
diff --git a/src/config.rs b/src/config.rs
index d219072..6d59107 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -24,6 +24,10 @@ pub struct Launcher {
     /// Config::proton_version).
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub proton_version: Option<String>,
+    /// Games installed through this launcher. Overlays (gamemode, mangohud,
+    /// gamescope) only apply to games — the launcher itself always runs bare.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub games: Vec<Game>,
 }
 
 impl Launcher {
@@ -31,6 +35,40 @@ impl Launcher {
     pub fn full_exe_path(&self) -> PathBuf {
         self.prefix_dir.join("drive_c").join(&self.exe_path)
     }
+
+    pub fn find_game(&self, name: &str) -> Option<&Game> {
+        self.games.iter().find(|g| g.name == name)
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Game {
+    /// Short CLI name (e.g. "overwatch").
+    pub name: String,
+    /// Display name for tray / menus.
+    pub display: String,
+    /// Path to the game exe relative to the launcher's prefix `drive_c/`.
+    pub exe_path: PathBuf,
+    /// Optional extra args passed to the game exe after umu-run.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub args: Vec<String>,
+    /// Wrap the game in `gamemoderun`.
+    #[serde(default)]
+    pub gamemode: bool,
+    /// Set `MANGOHUD=1` for the game process.
+    #[serde(default)]
+    pub mangohud: bool,
+    /// Wrap the game in `gamescope`. `None` = disabled; `Some(vec)` = enabled
+    /// with those CLI args (empty vec = gamescope defaults).
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub gamescope: Option<Vec<String>>,
+}
+
+impl Game {
+    /// Absolute path to the game exe inside the launcher's prefix.
+    pub fn full_exe_path(&self, launcher: &Launcher) -> PathBuf {
+        launcher.prefix_dir.join("drive_c").join(&self.exe_path)
+    }
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -93,6 +131,7 @@ pub fn presets() -> Vec<Launcher> {
             process_pattern: r"Battle\.net".into(),
             installer_url: None,
             proton_version: None,
+            games: vec![],
         },
         Launcher {
             name: "eaapp".into(),
@@ -105,6 +144,7 @@ pub fn presets() -> Vec<Launcher> {
             process_pattern: r"EADesktop\.exe".into(),
             installer_url: None,
             proton_version: None,
+            games: vec![],
         },
         Launcher {
             name: "epic".into(),
@@ -117,6 +157,7 @@ pub fn presets() -> Vec<Launcher> {
             process_pattern: r"EpicGamesLauncher\.exe".into(),
             installer_url: None,
             proton_version: None,
+            games: vec![],
         },
         Launcher {
             name: "ubisoft".into(),
@@ -129,6 +170,7 @@ pub fn presets() -> Vec<Launcher> {
             process_pattern: r"UbisoftConnect\.exe|upc\.exe".into(),
             installer_url: None,
             proton_version: None,
+            games: vec![],
         },
         Launcher {
             name: "gog".into(),
@@ -141,6 +183,7 @@ pub fn presets() -> Vec<Launcher> {
             process_pattern: r"GalaxyClient\.exe".into(),
             installer_url: None,
             proton_version: None,
+            games: vec![],
         },
         Launcher {
             name: "rockstar".into(),
@@ -153,6 +196,7 @@ pub fn presets() -> Vec<Launcher> {
             process_pattern: r"Rockstar Games.*Launcher\.exe".into(),
             installer_url: None,
             proton_version: None,
+            games: vec![],
         },
     ]
 }
@@ -280,12 +324,120 @@ impl Config {
             process_pattern,
             installer_url,
             proton_version: None,
+            games: vec![],
         });
         self.save()?;
         println!("\x1b[1;32m✓\x1b[0m Added launcher '{name}'.");
         Ok(())
     }
 
+    #[allow(clippy::too_many_arguments)]
+    pub fn add_game(
+        &mut self,
+        launcher: &str,
+        name: String,
+        display: Option<String>,
+        exe_path: PathBuf,
+        gamemode: bool,
+        mangohud: bool,
+        gamescope: Option<Vec<String>>,
+    ) -> Result<()> {
+        let l = self
+            .launchers
+            .iter_mut()
+            .find(|l| l.name == launcher)
+            .ok_or_else(|| {
+                anyhow::anyhow!("no launcher named '{launcher}'")
+            })?;
+        if l.games.iter().any(|g| g.name == name) {
+            anyhow::bail!(
+                "launcher '{launcher}' already has a game named '{name}'"
+            );
+        }
+        let display = display.unwrap_or_else(|| name.clone());
+        l.games.push(Game {
+            name: name.clone(),
+            display,
+            exe_path,
+            args: vec![],
+            gamemode,
+            mangohud,
+            gamescope,
+        });
+        self.save()?;
+        println!(
+            "\x1b[1;32m✓\x1b[0m Added game '{name}' under launcher '{launcher}'."
+        );
+        Ok(())
+    }
+
+    pub fn remove_game(&mut self, launcher: &str, name: &str) -> Result<()> {
+        let l = self
+            .launchers
+            .iter_mut()
+            .find(|l| l.name == launcher)
+            .ok_or_else(|| {
+                anyhow::anyhow!("no launcher named '{launcher}'")
+            })?;
+        let before = l.games.len();
+        l.games.retain(|g| g.name != name);
+        if l.games.len() == before {
+            anyhow::bail!(
+                "launcher '{launcher}' has no game named '{name}'"
+            );
+        }
+        self.save()?;
+        println!("\x1b[1;32m✓\x1b[0m Removed game '{name}' from '{launcher}'.");
+        Ok(())
+    }
+
+    /// Update per-game overlay flags. Each arg is `None` = leave as-is.
+    /// `gamescope = Some(None)` disables it; `Some(Some(vec))` enables with args.
+    pub fn set_game_flags(
+        &mut self,
+        launcher: &str,
+        name: &str,
+        gamemode: Option<bool>,
+        mangohud: Option<bool>,
+        gamescope: Option<Option<Vec<String>>>,
+    ) -> Result<()> {
+        if gamemode.is_none() && mangohud.is_none() && gamescope.is_none() {
+            anyhow::bail!(
+                "nothing to set — pass --gamemode, --mangohud, --gamescope, or --no-gamescope"
+            );
+        }
+        let l = self
+            .launchers
+            .iter_mut()
+            .find(|l| l.name == launcher)
+            .ok_or_else(|| {
+                anyhow::anyhow!("no launcher named '{launcher}'")
+            })?;
+        let g = l
+            .games
+            .iter_mut()
+            .find(|g| g.name == name)
+            .ok_or_else(|| {
+                anyhow::anyhow!(
+                    "launcher '{launcher}' has no game named '{name}'"
+                )
+            })?;
+        if let Some(v) = gamemode {
+            g.gamemode = v;
+        }
+        if let Some(v) = mangohud {
+            g.mangohud = v;
+        }
+        if let Some(v) = gamescope {
+            g.gamescope = v;
+        }
+        self.save()?;
+        println!(
+            "\x1b[1;32m✓\x1b[0m Updated flags for '{launcher}/{name}'."
+        );
+        Ok(())
+    }
+
     pub fn remove_launcher(&mut self, name: &str) -> Result<()> {
         let before = self.launchers.len();
         self.launchers.retain(|l| l.name != name);
diff --git a/src/launcher.rs b/src/launcher.rs
index c538361..71fb2cb 100644
--- a/src/launcher.rs
+++ b/src/launcher.rs
@@ -1,5 +1,7 @@
-use crate::config::{Config, Launcher};
+use crate::config::{Config, Game, Launcher};
 use anyhow::{bail, Context, Result};
+use std::ffi::OsString;
+use std::path::Path;
 use std::process::Stdio;
 use std::thread;
 use std::time::Duration;
@@ -42,6 +44,73 @@ pub fn launch(config: &Config, launcher: &Launcher) -> Result<()> {
     Ok(())
 }
 
+/// Launch a game installed through `launcher`, wrapped in the per-game
+/// overlays (gamescope, gamemoderun, MANGOHUD). The launcher itself is
+/// never wrapped — only games run through this path pick up overlays.
+pub fn play_game(config: &Config, launcher: &Launcher, game: &Game) -> Result<()> {
+    let exe = game.full_exe_path(launcher);
+    if !exe.exists() {
+        bail!(
+            "game exe not found at {:?}\n\
+             Check exe_path for '{}/{}' in config, or install the game via the launcher first.",
+            exe,
+            launcher.name,
+            game.name,
+        );
+    }
+
+    let version = launcher
+        .proton_version
+        .as_deref()
+        .unwrap_or(&config.proton_version);
+    let proton_path: OsString = if version == "GE-Proton" {
+        version.to_string().into()
+    } else {
+        config.proton_compat_dir.join(version).into_os_string()
+    };
+
+    let (prog, args) = build_wrapped_argv(&exe, game);
+
+    let mut cmd = std::process::Command::new(&prog);
+    cmd.env("WINEPREFIX", &launcher.prefix_dir)
+        .env("GAMEID", &launcher.gameid)
+        .env("PROTONPATH", &proton_path);
+    if game.mangohud {
+        cmd.env("MANGOHUD", "1");
+    }
+    cmd.args(&args);
+    cmd.spawn().with_context(|| {
+        format!(
+            "Failed to spawn '{}'. Is umu-run / gamemoderun / gamescope on PATH?",
+            prog.to_string_lossy()
+        )
+    })?;
+    Ok(())
+}
+
+/// Outermost → innermost: gamescope → gamemoderun → umu-run → exe [args]
+fn build_wrapped_argv(exe: &Path, game: &Game) -> (OsString, Vec<OsString>) {
+    let mut argv: Vec<OsString> = Vec::new();
+    if let Some(gs_args) = &game.gamescope {
+        argv.push("gamescope".into());
+        for a in gs_args {
+            argv.push(a.into());
+        }
+        argv.push("--".into());
+    }
+    if game.gamemode {
+        argv.push("gamemoderun".into());
+    }
+    argv.push("umu-run".into());
+    argv.push(exe.as_os_str().to_os_string());
+    for a in &game.args {
+        argv.push(a.into());
+    }
+    let mut iter = argv.into_iter();
+    let prog = iter.next().expect("argv contains at least umu-run");
+    (prog, iter.collect())
+}
+
 /// SIGTERM → wait 3 s → SIGKILL for a single launcher.
 pub fn kill(launcher: &Launcher) -> Result<()> {
     kill_pattern(&launcher.process_pattern);
diff --git a/src/main.rs b/src/main.rs
index 4356038..65189c5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -46,6 +46,21 @@ enum Commands {
     /// List configured launchers and whether they're installed / running
     Launchers,
 
+    /// Play a specific game through its launcher's prefix, applying the
+    /// per-game overlay flags (gamemode, mangohud, gamescope).
+    Play {
+        /// Launcher name (e.g. battlenet)
+        launcher: String,
+        /// Game name (e.g. overwatch)
+        game: String,
+    },
+
+    /// List configured games per launcher
+    Games {
+        /// Only show games for this launcher (omit for all)
+        launcher: Option<String>,
+    },
+
     /// Print setup instructions for a launcher (automated wizard coming soon)
     Setup {
         /// Launcher name
@@ -132,6 +147,60 @@ enum ConfigAction {
         /// Short CLI name
         name: String,
     },
+    /// Add a game under an existing launcher
+    AddGame {
+        /// Launcher that owns this game
+        launcher: String,
+
+        /// Short CLI name for the game (e.g. "overwatch")
+        name: String,
+
+        /// Game exe path relative to drive_c/
+        #[arg(long, value_name = "PATH")]
+        exe_path: PathBuf,
+
+        /// Display name (defaults to NAME)
+        #[arg(long)]
+        display: Option<String>,
+
+        /// Wrap the game in gamemoderun
+        #[arg(long)]
+        gamemode: bool,
+
+        /// Set MANGOHUD=1 for the game
+        #[arg(long)]
+        mangohud: bool,
+
+        /// Enable gamescope with these args (space-separated, e.g. "-f -W 2560")
+        #[arg(long, value_name = "ARGS")]
+        gamescope: Option<String>,
+    },
+    /// Remove a game from a launcher
+    RemoveGame {
+        launcher: String,
+        name: String,
+    },
+    /// Toggle per-game overlay flags
+    SetGameFlags {
+        launcher: String,
+        name: String,
+
+        /// true / false — wrap in gamemoderun
+        #[arg(long, value_name = "BOOL")]
+        gamemode: Option<bool>,
+
+        /// true / false — set MANGOHUD=1
+        #[arg(long, value_name = "BOOL")]
+        mangohud: Option<bool>,
+
+        /// Enable gamescope with these args (space-separated)
+        #[arg(long, value_name = "ARGS", conflicts_with = "no_gamescope")]
+        gamescope: Option<String>,
+
+        /// Disable gamescope wrapping
+        #[arg(long)]
+        no_gamescope: bool,
+    },
 }
 
 #[derive(Subcommand)]
@@ -186,6 +255,40 @@ fn main() -> Result<()> {
             }
         }
 
+        Commands::Play { launcher: lname, game: gname } => {
+            let l = config.find(&lname).ok_or_else(|| {
+                anyhow::anyhow!("unknown launcher '{lname}' — try `umutray launchers`")
+            })?;
+            let g = l.find_game(&gname).ok_or_else(|| {
+                anyhow::anyhow!(
+                    "launcher '{lname}' has no game named '{gname}' — try `umutray games {lname}`"
+                )
+            })?;
+            launcher::play_game(&config, l, g)?;
+        }
+
+        Commands::Games { launcher: lname } => {
+            let launchers: Vec<&config::Launcher> = match &lname {
+                Some(n) => vec![config.find(n).ok_or_else(|| {
+                    anyhow::anyhow!("unknown launcher '{n}' — try `umutray launchers`")
+                })?],
+                None => config.launchers.iter().collect(),
+            };
+            for l in launchers {
+                if l.games.is_empty() {
+                    println!("  {}: (no games)", l.display);
+                    continue;
+                }
+                println!("  {}:", l.display);
+                for g in &l.games {
+                    let installed = g.full_exe_path(l).exists();
+                    let marker = if installed { "\x1b[1;32m✓\x1b[0m" } else { "·" };
+                    let flags = format_game_flags(g);
+                    println!("    {marker} {:14} {}{}", g.name, g.display, flags);
+                }
+            }
+        }
+
         Commands::Setup { name } => {
             let l = config.find(&name).ok_or_else(|| {
                 anyhow::anyhow!("unknown launcher '{name}' — try `umutray launchers`")
@@ -231,6 +334,55 @@ fn main() -> Result<()> {
                 let mut c = config;
                 c.remove_launcher(&name)?;
             }
+            ConfigAction::AddGame {
+                launcher,
+                name,
+                exe_path,
+                display,
+                gamemode,
+                mangohud,
+                gamescope,
+            } => {
+                let mut c = config;
+                let gs = gamescope.map(|s| {
+                    s.split_whitespace().map(String::from).collect::<Vec<_>>()
+                });
+                c.add_game(
+                    &launcher,
+                    name,
+                    display,
+                    exe_path,
+                    gamemode,
+                    mangohud,
+                    gs,
+                )?;
+            }
+            ConfigAction::RemoveGame { launcher, name } => {
+                let mut c = config;
+                c.remove_game(&launcher, &name)?;
+            }
+            ConfigAction::SetGameFlags {
+                launcher,
+                name,
+                gamemode,
+                mangohud,
+                gamescope,
+                no_gamescope,
+            } => {
+                let gs_update = if no_gamescope {
+                    Some(None)
+                } else {
+                    gamescope.map(|s| {
+                        Some(
+                            s.split_whitespace()
+                                .map(String::from)
+                                .collect::<Vec<_>>(),
+                        )
+                    })
+                };
+                let mut c = config;
+                c.set_game_flags(&launcher, &name, gamemode, mangohud, gs_update)?;
+            }
         },
 
         Commands::Service { action } => match action {
@@ -242,3 +394,21 @@ fn main() -> Result<()> {
 
     Ok(())
 }
+
+fn format_game_flags(g: &config::Game) -> String {
+    let mut tags: Vec<&str> = Vec::new();
+    if g.gamemode {
+        tags.push("gamemode");
+    }
+    if g.mangohud {
+        tags.push("mangohud");
+    }
+    if g.gamescope.is_some() {
+        tags.push("gamescope");
+    }
+    if tags.is_empty() {
+        String::new()
+    } else {
+        format!("  [{}]", tags.join(", "))
+    }
+}
diff --git a/src/tray.rs b/src/tray.rs
index 1157a58..d320be3 100644
--- a/src/tray.rs
+++ b/src/tray.rs
@@ -16,6 +16,51 @@ fn spawn_setup(name: &str) {
     }
 }
 
+enum GameFlag {
+    GameMode,
+    MangoHud,
+    Gamescope,
+}
+
+fn toggle_flag(this: &mut UmuTray, launcher: &str, game: &str, flag: GameFlag) {
+    for l in this.config.launchers.iter_mut() {
+        if l.name != launcher {
+            continue;
+        }
+        for g in l.games.iter_mut() {
+            if g.name != game {
+                continue;
+            }
+            match flag {
+                GameFlag::GameMode => g.gamemode = !g.gamemode,
+                GameFlag::MangoHud => g.mangohud = !g.mangohud,
+                GameFlag::Gamescope => {
+                    g.gamescope = if g.gamescope.is_some() {
+                        None
+                    } else {
+                        Some(vec![])
+                    };
+                }
+            }
+        }
+    }
+    if let Err(e) = this.config.save() {
+        eprintln!("umutray: failed to persist flag toggle: {e}");
+    }
+}
+
+fn play_from_tray(config: &Config, launcher: &str, game: &str) {
+    let Some(l) = config.find(launcher) else {
+        return;
+    };
+    let Some(g) = l.find_game(game) else {
+        return;
+    };
+    if let Err(e) = crate::launcher::play_game(config, l, g) {
+        eprintln!("umutray: play {game} failed: {e}");
+    }
+}
+
 pub struct UmuTray {
     pub config: Config,
     /// Per-launcher running state keyed by launcher.name
@@ -69,12 +114,13 @@ impl ksni::Tray for UmuTray {
             }
 
             if running {
+                let kill_name = name.clone();
                 items.push(
                     StandardItem {
                         label: format!("Kill {display}"),
                         icon_name: "process-stop".into(),
                         activate: Box::new(move |this: &mut Self| {
-                            if let Some(l) = this.config.find(&name) {
+                            if let Some(l) = this.config.find(&kill_name) {
                                 let _ = launcher::kill(l);
                             }
                         }),
@@ -83,12 +129,13 @@ impl ksni::Tray for UmuTray {
                     .into(),
                 );
             } else {
+                let launch_name = name.clone();
                 items.push(
                     StandardItem {
                         label: format!("Launch {display}"),
                         icon_name: "media-playback-start".into(),
                         activate: Box::new(move |this: &mut Self| {
-                            if let Some(l) = this.config.find(&name) {
+                            if let Some(l) = this.config.find(&launch_name) {
                                 if let Err(e) = launcher::launch(&this.config, l) {
                                     eprintln!("umutray: launch {} failed: {e}", l.name);
                                 }
@@ -99,6 +146,75 @@ impl ksni::Tray for UmuTray {
                     .into(),
                 );
             }
+
+            // Per-game submenus with Play + overlay toggles.
+            for g in &l.games {
+                let gdisplay = g.display.clone();
+                let gname_play = g.name.clone();
+                let lname_play = name.clone();
+                let gname_gm = g.name.clone();
+                let lname_gm = name.clone();
+                let gname_mh = g.name.clone();
+                let lname_mh = name.clone();
+                let gname_gs = g.name.clone();
+                let lname_gs = name.clone();
+
+                let mut sub: Vec<ksni::MenuItem<Self>> = Vec::new();
+                sub.push(
+                    StandardItem {
+                        label: format!("Play {gdisplay}"),
+                        icon_name: "media-playback-start".into(),
+                        activate: Box::new(move |this: &mut Self| {
+                            play_from_tray(&this.config, &lname_play, &gname_play);
+                        }),
+                        ..Default::default()
+                    }
+                    .into(),
+                );
+                sub.push(ksni::MenuItem::Separator);
+                sub.push(
+                    CheckmarkItem {
+                        label: "GameMode".into(),
+                        checked: g.gamemode,
+                        activate: Box::new(move |this: &mut Self| {
+                            toggle_flag(this, &lname_gm, &gname_gm, GameFlag::GameMode);
+                        }),
+                        ..Default::default()
+                    }
+                    .into(),
+                );
+                sub.push(
+                    CheckmarkItem {
+                        label: "MangoHud".into(),
+                        checked: g.mangohud,
+                        activate: Box::new(move |this: &mut Self| {
+                            toggle_flag(this, &lname_mh, &gname_mh, GameFlag::MangoHud);
+                        }),
+                        ..Default::default()
+                    }
+                    .into(),
+                );
+                sub.push(
+                    CheckmarkItem {
+                        label: "Gamescope".into(),
+                        checked: g.gamescope.is_some(),
+                        activate: Box::new(move |this: &mut Self| {
+                            toggle_flag(this, &lname_gs, &gname_gs, GameFlag::Gamescope);
+                        }),
+                        ..Default::default()
+                    }
+                    .into(),
+                );
+
+                items.push(
+                    SubMenu {
+                        label: gdisplay,
+                        submenu: sub,
+                        ..Default::default()
+                    }
+                    .into(),
+                );
+            }
         }
 
         items.push(ksni::MenuItem::Separator);