Suggestions for 360 system link games

Thank you in advance for any and all help provided,

Ok so here is the deal, I will have my kids(2) over for a week. I have 2 nephews(living with) plus my self(total of 5 players). What games can we all play over system link(not XBL). We will be using a total of 4 xbox360. My kids each have their own system, I have my own system but my nephews share 1 between both of them. Game Rating doesnt matter but what games dont cap out at 4 players? XBLA or disc base. Does any one have a multi setup at their place that can give suggestions on "how to\best setup" for local paly?