See the instructions page in the game. :D Power-ups: 1. Laser shield: be invincible for 5 seconds 2. Health potion: restore a certain amount of health for each level. 3. unlimited ammo: lose no ammo for 5 seconds. 4. Extra impact: shots have twice as much impact for 10 seconds.
If U press X it messes the game up try not to. get 220 or over and you are actually nasty. ===========STORY=============== After your heroic accomplishments against the aliens one year ago, it turns out one survived and reproduced until a whole new alien army showed up in area 52... Luckily, this time you are not on your own, you have one friend helping you. Multiplayer is here!
