Space Fortress

You’re the commander of a mercenary group on a distant planet. Your mission is simple, defend your territory against 30 waves of attacks from space creatures. Purchase new weapons, hire more mercenaries, buy new perks and evolve your fortress to fulfill this task.
Developed by: http://www.vabolt.com

Arrow keys or W, A, S, D to move
Mouse to aim and shot (Hold the mouse button to keep firing)
1, 2, 3, 4, 5, 6, 7, 8, 9, 0 to change weapons
Esc to pause and open options menu