HP Personal Space Invaders

And you thought office-supplies were boring? Well, you're right but not in this game! (in classics, action and shoot em up)

Play similar games:

Galaga This is the gametechnical version of going back to kindergarten and wonder why everything seemed so large back then.
Star Wings A nice Shoot-em-up with an amazingly high amount of PCK...
Ether War Oldschool actionshooter with the right amount of special effects. Shoot first, ask never.