So, my game.ini settings list:
(Not sure if it's all currrent and it's a bit suck it and see)
bUseVehicleInsertion=False // I got bored with the whole truck animation thing
FriendlyBotQuota=0 //Useful to have no AI help with friendlies - needs bBot to use
MinimumEnemies=6 // Pick a number 1/2 per estimated player?
MaximumEnemies=15 //Maybe 4/5 * estimated players
DefendTimer=60 //Defend for longer and die more. This is a fairly short time.
bBots=False // Disable friendly bots - players only
PostRoundTime=5 //Matter of taste (menu delays)
PostGameTime=5 //Matter of taste (menu delays)
FriendlyFireReflect=0.2 //Wound your friends and you get wounded X amount. Not realistic, but punishes mistakes. Can be 'fun'.
bMapVoting=True //Matter of taste
bUseMapCycle=True //Matter of taste - I had a map rotation of just co-op
bDeadSay=True //Use games comms after death
bVoiceAllowDeadChat=True // Text version
bKillFeed=True // Text at the top. Some people like, some people hate
bKillerInfoRevealDistance=True // Interesting info, but not required