diff --git a/src/actor.rs b/src/actor.rs
index e15ee62..a601eaf 100644
--- a/src/actor.rs
+++ b/src/actor.rs
@@ -17,9 +17,11 @@ impl Plugin for ActorPlugin {
             handle_send_messages,
             handle_conversations,
             handle_input,
+            handle_chat_scripts,
         ));
         app.add_event::<StartConversationEvent>();
         app.add_event::<SendMessageEvent>();
+        app.add_event::<ChatScriptEvent>();
     }
 }
 
@@ -35,6 +37,12 @@ pub struct SendMessageEvent {
     pub text: String,
 }
 
+#[derive(Event)]
+pub struct ChatScriptEvent {
+    name: String,
+    param: String,
+}
+
 #[derive(Component)]
 pub struct Actor {
     pub hp: f32,
@@ -74,6 +82,8 @@ pub struct ChatBranch {
     pub reply: String,
     pub goto: String,
     pub choice: String,
+    pub script: String,
+    pub script_parameter: String,
 }
 
 #[derive(Component)]
@@ -266,6 +276,7 @@ pub fn handle_send_messages(
     mut commands: Commands,
     mut er_sendmsg: EventReader<SendMessageEvent>,
     mut ew_sfx: EventWriter<audio::PlaySfxEvent>,
+    mut ew_chatscript: EventWriter<ChatScriptEvent>,
     mut q_conv: Query<(Entity, &mut Chat)>,
     time: Res<Time>,
     chat_branches: Query<&ChatBranch>,
@@ -324,6 +335,12 @@ pub fn handle_send_messages(
                     });
                 }
             }
+            if !branch.script.is_empty() {
+                ew_chatscript.send(ChatScriptEvent {
+                    name: branch.script.clone(),
+                    param: branch.script_parameter.clone(),
+                });
+            }
         }
         break; // let's only handle one of these per frame
     }
@@ -334,6 +351,7 @@ pub fn handle_conversations(
     mut log: ResMut<hud::Log>,
     mut q_conv: Query<(Entity, &mut Chat)>,
     mut ew_sfx: EventWriter<audio::PlaySfxEvent>,
+    mut ew_chatscript: EventWriter<ChatScriptEvent>,
     time: Res<Time>,
     chat_branches: Query<&ChatBranch>, // TODO: use Table for faster iteration?
 ) {
@@ -363,7 +381,7 @@ pub fn handle_conversations(
             match branch.level.as_str() {
                 "chat" => log.chat(branch.reply.clone(), branch.name.clone()),
                 "info" => log.info(branch.reply.clone()),
-                    "warn" => log.warning(branch.reply.clone()),
+                "warn" => log.warning(branch.reply.clone()),
                 _ => (),
             }
         }
@@ -392,5 +410,30 @@ pub fn handle_conversations(
                 });
             }
         }
+
+        if !branch.script.is_empty() {
+            ew_chatscript.send(ChatScriptEvent {
+                name: branch.script.clone(),
+                param: branch.script_parameter.clone(),
+            });
+        }
+    }
+}
+
+pub fn handle_chat_scripts(
+    mut er_chatscript: EventReader<ChatScriptEvent>,
+    mut q_player: Query<(&mut Actor, &mut Suit), With<Player>>,
+) {
+    for script in er_chatscript.read() {
+        match script.name.as_str() {
+            "refilloxygen" => if let Ok(amount) = script.param.parse::<f32>() {
+                for (mut _actor, mut suit) in q_player.iter_mut() {
+                    suit.oxygen = (suit.oxygen + amount).clamp(0.0, suit.oxygen_max);
+                }
+            } else {
+                error!("Invalid parameter for command `{}`: `{}`", script.name, script.param);
+            }
+            _ => {}
+        }
     }
 }
diff --git a/src/defs.txt b/src/defs.txt
index d8a4f38..b7d68b1 100644
--- a/src/defs.txt
+++ b/src/defs.txt
@@ -133,6 +133,8 @@ actor -300 0 40 suit
         msg 15 dead outcold "No life signs detected"
             lvl info
         choice 0 outcold EXIT "Damn, it's gotta be moldy in that suit. How long has it been drifting?"
+        choice 0 outcold EXIT "Harvest some oxygen"
+            script refilloxygen 0.08
         msg 0 outcold EXIT ""
 
 chat error
diff --git a/src/world.rs b/src/world.rs
index c94b874..602d32e 100644
--- a/src/world.rs
+++ b/src/world.rs
@@ -254,6 +254,8 @@ struct ParserState {
     goto: String,
     is_choice: bool,
     stores_item: bool,
+    script: String,
+    script_parameter: String,
 }
 impl Default for ParserState {
     fn default() -> Self {
@@ -286,6 +288,8 @@ impl Default for ParserState {
             goto: "".to_string(),
             is_choice: false,
             stores_item: false,
+            script: "".to_string(),
+            script_parameter: "".to_string(),
         }
     }
 }
@@ -318,6 +322,8 @@ impl ParserState {
             reply: if self.is_choice { "".to_string() } else { self.text.clone() },
             choice: if self.is_choice { self.text.clone() } else { "".to_string() },
             goto: self.goto.clone(),
+            script: self.script.clone(),
+            script_parameter: self.script_parameter.clone(),
         }
     }
     fn spawn_chat(&mut self, commands: &mut Commands) {
@@ -606,6 +612,10 @@ pub fn load_defs(
                 debug!("Registering level: {}", level);
                 state.level = level.to_string();
             }
+            ["script", scriptname, parameter] => {
+                state.script = scriptname.to_string();
+                state.script_parameter = parameter.to_string();
+            }
             _ => {
                 error!("No match for [{}]", parts.join(","));
             }