I always loved this game mode I created to turn Perfect Dark into a spectator sport Gladiator deathmatch.
You will need Infinite Ammo, and Cloaking device. If you want to interfere, have Invincibility handy, too.
Set up the game- King Of The Hill (stationary hill, 10 second score time), Fortress, All weapons are the Laser except slot 3, which is the shield. Fill the Roster up with HardSims, all on seperate teams. One will be on your team as there are only 8 teams.
Start the match. If the Hill is not set on the walkway over the central pit, restart until it is. Switch on your cloaking device, run down to the hill, stand over the shield spawn that should be in the middle and order your team's bot to 'Hold' facing as much walkway as you can see. Run out of the hill quickly, and move up to the Red balcony. From here you can watch all the bots make their desperate attempts to gain control of the hill and ward off all seven others for the 10 seconds they need to score. As HardSims, they are smart enough to use the Laser's secondary to push eachother into the abyss, but they don't overuse it. You need to order your bot to hold over the shield because for some reason, bots on a player's team are pathetic, and will usually flee the hill for their lives at the first sign of difficulty.
Seeing 8 bots in the arena at once with blue laser fire flying everywhere is quite a sight to behold! Change team names to your friend's names to really spice it up!