Halo: The Covenant War

From the introduction:
Halo: The Covenant War is a tabletop RPG based on Bungie’s Halo series of FPS
games. It uses a variant of Fudge, a free system created by Steffan O’Sullivan. The
complete rules are included here, but if you’re interested in finding out more about the
system and its endless options you can get it online, or there’s a print version published
by Grey Ghost Games. I went with Fudge basically because I’m intimately familiar with
it and know how to make it do what I want. Character creation is radically changed from
any existing Fudge variant, and the default wounding rules are replaced with health
points. For more on Fudge, check out www.fudgerpg.com; there are zillions of different
variant rules that could be plugged into this game if you’re so inclined, especially in the
hardcover Fudge 10th Anniversary Edition.