I don't know the budget, but I see a lot of mobile games in Southend Interactive's catalog, so:
Deathrow

A 4v4 fictional combat sport title. It's fun enough to play for a day or so... but if you can find 3 other people to sit on the couch and play with, that's where it can be really fun.
Our strategy was to usually have 1 person be the forward, 2 people be enforcers who stomped the enemy into the asphalt, and the goalie would try to prevent any early scores until the opposing team was knocked unconscious.