Robo-War: Crazy fast and hard, yet still has multiple strategies. A great competition game. Never gets old.
White Water: Theme will never age, fantastic sound track. Randomized shots ensure that no 2 games are ever really the same. Shots are smoother than James Bond covered in olive oil slipping between satin bed sheets.
Jacks Open: Probably the best shooters game of the EM era with the most interesting rules.