Gem Wars: Attack of the Jiblets Windows, Mac, Linux game

Gem Wars: Attack of the Jiblets is a combat platformer for up to 4 players. It's a local/online party game centered around the concept of "constant one-upmanship." Power-ups include gems that can be picked up to empower your character with a certain element. Each element has a strength and a weakness (i.e, fire is strong against earth, but water is strong against fire). Also available are Lethal Arms, which can change your default weapon shot from a normal pea-shot to a Gatling, Barrage, Launcher, Ball or Thrower. When these two power-ups are combined they can make a deadly new weapon (i.e, Fire Gem + Stream-Shot Arm = Flamethrower or Water Gem + Stream-Shot Arm = Super Soaker).