diff --git a/.gitignore b/.gitignore
index cf4e96af..d314a4e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@ node_modules
 package-lock.json
 .DS_Store
 out-*
-proto/google
\ No newline at end of file
+proto/google
+.idea
\ No newline at end of file
diff --git a/proto/decentraland/kernel/apis/comms_api.proto b/proto/decentraland/kernel/apis/comms_api.proto
index 4288fe71..0f1b1ec9 100644
--- a/proto/decentraland/kernel/apis/comms_api.proto
+++ b/proto/decentraland/kernel/apis/comms_api.proto
@@ -20,6 +20,42 @@ message VideoTracksActiveStreamsData {
     VideoTrackSourceType source_type = 3;
 }
 
+message SubscribeToTopicRequest {
+  string topic = 1;
+}
+
+message SubscribeToTopicResponse {}
+
+message UnsubscribeFromTopicRequest {
+  string topic = 1;
+}
+
+message UnsubscribeFromTopicResponse {}
+
+message PublishDataRequest {
+  string topic = 1;
+  string data = 2;
+}
+
+message PublishDataResponse {}
+
+message ConsumeMessagesRequest {
+  string topic = 1;
+}
+
+message ConsumeMessages {
+  string sender = 1;
+  string data = 2;
+}
+
+message ConsumeMessagesResponse {
+  repeated ConsumeMessages messages = 1;
+}
+
 service CommsApiService {
   rpc GetActiveVideoStreams(VideoTracksActiveStreamsRequest) returns (VideoTracksActiveStreamsResponse) {}
-}
\ No newline at end of file
+  rpc SubscribeToTopic(SubscribeToTopicRequest) returns (SubscribeToTopicResponse) {}
+  rpc UnsubscribeFromTopic(UnsubscribeFromTopicRequest) returns (UnsubscribeFromTopicResponse) {}
+  rpc PublishData(PublishDataRequest) returns (PublishDataResponse) {}
+  rpc ConsumeMessages(ConsumeMessagesRequest) returns (ConsumeMessagesResponse) {}
+}
diff --git a/proto/decentraland/kernel/comms/rfc4/comms.proto b/proto/decentraland/kernel/comms/rfc4/comms.proto
index ad864959..66427042 100644
--- a/proto/decentraland/kernel/comms/rfc4/comms.proto
+++ b/proto/decentraland/kernel/comms/rfc4/comms.proto
@@ -18,6 +18,9 @@ message Packet {
     PlayerEmote player_emote = 9;
     SceneEmote scene_emote = 10;
     MovementCompressed movement_compressed = 12;
+    LookAtPosition look_at_position = 13;
+    Reaction reaction = 14;
+    ChatReaction chat_reaction = 15;
   }
   uint32 protocol_version = 11;
 }
@@ -138,3 +141,25 @@ message Voice {
     VC_OPUS = 0;
   }
 }
+
+// Message sent to force an avatar to look at a position
+message LookAtPosition {
+  float timestamp = 1;
+  // world position
+  float position_x = 2;
+  float position_y = 3;
+  float position_z = 4;
+  string target_avatar_wallet_address = 5;
+}
+
+message Reaction {
+  int32 emoji_index = 1;
+  float timestamp = 2;
+  int32 count = 3;
+}
+
+message ChatReaction {
+  int32 emoji_index = 1;
+  string message_id = 2;
+  string address = 3;
+}
diff --git a/proto/decentraland/sdk/components/audio_analysis.proto b/proto/decentraland/sdk/components/audio_analysis.proto
new file mode 100644
index 00000000..940f18af
--- /dev/null
+++ b/proto/decentraland/sdk/components/audio_analysis.proto
@@ -0,0 +1,44 @@
+syntax = "proto3";
+package decentraland.sdk.components;
+
+import "decentraland/sdk/components/common/id.proto";
+option (common.ecs_component_id) = 1212;
+
+enum PBAudioAnalysisMode {
+    MODE_RAW = 0;
+    MODE_LOGARITHMIC = 1;
+}
+
+message PBAudioAnalysis {
+
+    // Parameters section
+    PBAudioAnalysisMode mode = 1;
+
+    // Used only when mode == MODE_LOGARITHMIC
+    optional float amplitude_gain = 100;
+    optional float bands_gain = 101;
+    // End when mode == MODE_LOGARITHMIC
+
+    // End Parameters section
+
+    // Result section
+    float amplitude = 200;
+
+    // Protobuf doesn't support fixed arrays -> 8 band fields
+    float band_0 = 201;
+    float band_1 = 202;
+    float band_2 = 203;
+    float band_3 = 204;
+    float band_4 = 205;
+    float band_5 = 206;
+    float band_6 = 207;
+    float band_7 = 208;
+
+    // End Result section
+
+    // Future fields
+    // float spectral_centroid = 13;
+    // float spectral_flux = 14;
+    // bool onset = 15;
+    // float bpm = 16;
+}
diff --git a/proto/decentraland/sdk/components/common/input_action.proto b/proto/decentraland/sdk/components/common/input_action.proto
index 617f45b1..7ad11de0 100644
--- a/proto/decentraland/sdk/components/common/input_action.proto
+++ b/proto/decentraland/sdk/components/common/input_action.proto
@@ -17,6 +17,7 @@ enum InputAction {
   IA_ACTION_4 = 11;
   IA_ACTION_5 = 12;
   IA_ACTION_6 = 13;
+  // Modifier key (Shift on desktop)
   IA_MODIFIER = 14;
 }
 
diff --git a/proto/decentraland/sdk/components/particle_system.proto b/proto/decentraland/sdk/components/particle_system.proto
index 5d59d236..61ade1ae 100644
--- a/proto/decentraland/sdk/components/particle_system.proto
+++ b/proto/decentraland/sdk/components/particle_system.proto
@@ -65,7 +65,7 @@ message PBParticleSystem {
   optional PlaybackState playback_state = 22; // default = PS_PLAYING
 
   // --- Emission Bursts ---
-  repeated Burst bursts = 29;
+  optional BurstConfiguration bursts = 29;
 
   // ---- Nested types ----
 
@@ -102,6 +102,10 @@ message PBParticleSystem {
   }
 
   // Emission burst configuration.
+  message BurstConfiguration {
+    repeated Burst values = 1;
+  }
+  
   message Burst {
     float time = 1;                // Seconds from start of cycle.
     uint32 count = 2;             // Particles to emit.