1. Destroy every trigger that you no longer need or use. (e.g. Map Init, Intro Cinematic)
2. Destroy every floating text that you no longer need or use.
3. Destroy every special effect that you no longer need or use.
4. Hide then explode every unit on the map before ending the game for all players.
5. Hide then destroy every doodad on the map before ending the game for all players. | 
