Star Wars Battlefront II
You can edit modded maps that you have made with VisualMudge for Star Wars Battlefront II.
This enables you to use the Fake Console and Free camera mode in both single player and multiplayer maps. This allows you to boot any player not showing up in the in game player list.
This is a bunch of saved files for every single campaign mission in the game, so whenever you want to play a campagin file, you can just load these from the menu, instead of starting the campaign all over again.