diff --git a/src/Lobby.cc b/src/Lobby.cc
index 8ff904d9..d1d84ca8 100644
--- a/src/Lobby.cc
+++ b/src/Lobby.cc
@@ -618,6 +618,13 @@ Lobby::JoinError Lobby::join_error_for_client(std::shared_ptr<Client> c, const s
     return JoinError::VERSION_CONFLICT;
   }
   if (this->is_game()) {
+    // Brutal Peeps PC rooms rely on PC-only BattleParam runtime patching, so don't allow DC V2 clients to join them.
+    if ((this->brutal_peeps_tier >= 1) &&
+        this->version_is_allowed(Version::PC_V2) &&
+        (c->version() != Version::PC_V2)) {
+      return JoinError::VERSION_CONFLICT;
+    }
+
     if (this->check_flag(Flag::QUEST_SELECTION_IN_PROGRESS)) {
       return JoinError::QUEST_SELECTION_IN_PROGRESS;
     }
diff --git a/src/SendCommands.cc b/src/SendCommands.cc
index 97ee6182..0a276db1 100644
--- a/src/SendCommands.cc
+++ b/src/SendCommands.cc
@@ -2120,6 +2120,12 @@ void send_game_menu_t(std::shared_ptr<Client> c, bool is_spectator_team_list, bo
         (client_has_debug || (l->check_flag(Lobby::Flag::IS_CLIENT_CUSTOMIZATION) == c->check_flag(Client::Flag::IS_CLIENT_CUSTOMIZATION))) &&
         (l->check_flag(Lobby::Flag::IS_SPECTATOR_TEAM) == is_spectator_team_list) &&
         (!show_tournaments_only || l->tournament_match)) {
+      // Brutal Peeps PC rooms rely on PC-only BattleParam runtime patching, so don't show them to DC V2 clients.
+      if ((l->brutal_peeps_tier >= 1) &&
+          l->version_is_allowed(Version::PC_V2) &&
+          (c->version() != Version::PC_V2)) {
+        continue;
+      }
       games.emplace(l);
     }
   }