Peak 3 is a Paranoid (or blast thru) like game with multiplayer being the biggest aspect of the game.

You can play alone against a computer player, or with up to 4 players! (optimized for 3 player)

In 2 player mode, each player gets a paddle. If the ball gets past the other player, they lose health. You can also fire rockets, and use your shield to defend against rockets.

Player's 3 and 4 have the ability to place new blocks. If you have playing with only 3, the 3rd player can be neutral, or he can try to help 1 player with his block placements.