Stackonauts

Physics-based rescue competition

Stackonauts is a PC physics-based building and shooting game about rescuing survivors in hostile places far from Earth. In its PvP modes, you build towers for Stackonauts to climb, use cannons against competing rescuers, and try to save more survivors than they do. Structures can be destroyed, and physics, weather and other hazards complicate each rescue.

You can play as one of five heroes: Scientist, Medic, Warrior, Hybrid or Cyborg. Power-ups also appear during some rescues.