Halo Zero is a fan-created side-scrolling tribute to Halo. A lot of work has gone into this, making it as close to the game as possible. Things like shields, campaign/multiplayer, and weapon sounds appear to be almost directly from the original game.
Go here for Download and more Information:
LinkIts a very good game, work with XP and 7, I don't know if it works with Vista, as only my grandma's PC has it and I am strictly forbidden to install/download anything on it
Sorry snipers but the sniper rifle in this one makes it very difficult to snipe and you will most likely die trying to using it.
The guy who made it (not me) was dutch so the game is in dutch when you 1st run it but IT DOES HAVE AN ENGLISH SETTING. The dutch menu words look close enough to english that you should be able to find the language option easily.
Its definitely worth the look.
[Edited by rogue_leader999, 12/8/2009 6:20:14 PM][Edited by rogue_leader999, 12/17/2009 1:44:47 PM]