The game is an action platformer with many weapons and several vehicles that you can use to accomplish each level.
The level design is not linear, so that you have to discover items that allow you to unlock doors and weapons.
Every level of 15 missions, contains many enemies to fight, a middle sized boss and a huge final boss. You can play with keyboard only, or with keyboard and mouse (to aim), or with a game pad. Each mode gives you a different game feel.