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Reposting the old thread of mine:
Credits: Marty Kirra for the sprites, if there's anything else, tell me, because I don't remember who made the laser sprites.
Of course there will be some Hellsing fans out there. So, I made a single weapon for you. It's not that perfect, it will be improved if so.
http://www.megaupload.com/?d=3YGM829U
What it does is simple: it shoots a seeking bullet that tortures the victim until it bounces 5 times against walls and floors. Here are some screenshots: