I see a Patapon Tourney going as to who can kill a certain boss the fastest.
SC:BD would be awesome, I call Kratos! Matches my PSP.
MHF2/MHFU can have up to 4 people in one hunting zone. All damage is given to anyone that is hit by a weapon so a 4 way slaughter fest or have 2 1 on 1s within the zone.