Killheads is great combination of zombie shooting and 'match-three' puzzling with an atmospheric (and bloody!) horror theme. Match up and pop the monster heads before they reach the barricade. Use grenades to get out of a tight spot. Killheads has thirteen levels of relentless head-popping action and an online leaderboard for the best completion times.
How to play
Aim the cannon with the mouse. Use the left mouse button to fire heads. Match three heads in a row to pop them. Aim within a crowd of heads to use a grenade (indicated with a large cross-shaped cursor).