diff --git a/Makefile b/Makefile
index 403edbf..4be7d7f 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,8 @@ endif
 LFLAGS = -lhl -lsteam_api -lstdc++ -L sdk/redistributable_bin/$(OS)$(ARCH)
 
 SRC = native/cloud.o native/common.o native/controller.o native/friends.o native/gameserver.o \
-	native/matchmaking.o native/networking.o native/stats.o native/ugc.o
+	native/matchmaking.o native/networking.o native/stats.o native/ugc.o native/timeline.o
+
 
 all: ${SRC}
 	${CC} ${CFLAGS} -shared -o steam.hdll ${SRC} ${LFLAGS}
diff --git a/hlsteam.vcxproj b/hlsteam.vcxproj
index 95b35b6..fe78990 100644
--- a/hlsteam.vcxproj
+++ b/hlsteam.vcxproj
@@ -283,6 +283,7 @@
     <ClCompile Include="native\gameserver.cpp" />
     <ClCompile Include="native\matchmaking.cpp" />
     <ClCompile Include="native\networking.cpp" />
+    <ClCompile Include="native\timeline.cpp" />
     <ClCompile Include="native\stats.cpp" />
     <ClCompile Include="native\ugc.cpp" />
   </ItemGroup>
diff --git a/native/timeline.cpp b/native/timeline.cpp
new file mode 100644
index 0000000..236a246
--- /dev/null
+++ b/native/timeline.cpp
@@ -0,0 +1,34 @@
+#include "steamwrap.h"
+
+HL_PRIM void HL_NAME(set_timeline_state_description)(vbyte* description, float timeDelta) {
+    ISteamTimeline* timeline = SteamTimeline();
+    if (timeline) {
+        timeline->SetTimelineStateDescription((char*)description, timeDelta);
+    }
+}
+
+HL_PRIM void HL_NAME(clear_timeline_state_description)(float timeDelta) {
+    ISteamTimeline* timeline = SteamTimeline();
+    if (timeline) {
+        timeline->ClearTimelineStateDescription(timeDelta);
+    }
+}
+
+HL_PRIM void HL_NAME(add_timeline_event)(vbyte* icon, vbyte* title, vbyte* description, int priority, float startOffsetSeconds, float durationSeconds, int possibleClip) {
+    ISteamTimeline* timeline = SteamTimeline();
+    if (timeline) {
+        timeline->AddTimelineEvent((char*)icon, (char*)title, (char*)description, priority, startOffsetSeconds, durationSeconds, (ETimelineEventClipPriority)possibleClip);
+    }
+}
+
+HL_PRIM void HL_NAME(set_timeline_game_mode)(int mode) {
+    ISteamTimeline* timeline = SteamTimeline();
+    if (timeline) {
+        timeline->SetTimelineGameMode((ETimelineGameMode)mode);
+    }
+}
+
+DEFINE_PRIM(_VOID, set_timeline_state_description, _BYTES _F32);
+DEFINE_PRIM(_VOID, clear_timeline_state_description, _F32);
+DEFINE_PRIM(_VOID, add_timeline_event, _BYTES _BYTES _BYTES _I32 _F32 _F32 _I32);
+DEFINE_PRIM(_VOID, set_timeline_game_mode, _I32);
\ No newline at end of file
diff --git a/steam/Timeline.hx b/steam/Timeline.hx
new file mode 100644
index 0000000..2728367
--- /dev/null
+++ b/steam/Timeline.hx
@@ -0,0 +1,17 @@
+package steam;
+
+@:hlNative("steam")
+class Timeline {
+    public static function setTimelineStateDescription(description:String, timeDelta:hl.F32):Void {
+        @:privateAccess _SetTimelineStateDescription(description.toUtf8(), timeDelta);
+    }
+    public static function clearTimelineStateDescription(timeDelta:hl.F32):Void {}
+    public static function addTimelineEvent(icon:String, title:String, description:String, priority:Int, startOffsetSeconds:hl.F32, durationSeconds:hl.F32, possibleClip:Int):Void {
+        @:privateAccess _AddTimelineEvent(icon.toUtf8(), title.toUtf8(), description.toUtf8(), priority, startOffsetSeconds, durationSeconds, possibleClip);
+    }
+    public static function setTimelineGameMode(mode:Int):Void {}
+    
+
+    @:hlNative("?steam", "set_timeline_state_description") private static function _SetTimelineStateDescription(description:hl.Bytes, timeDelta:hl.F32):Void {}
+    @:hlNative("?steam", "add_timeline_event") private static function _AddTimelineEvent(icon:hl.Bytes, title:hl.Bytes, description:hl.Bytes, priority:Int, startOffsetSeconds:hl.F32, durationSeconds:hl.F32, possibleClip:Int):Void {}
+}
\ No newline at end of file