*Halo done right*
I have thrown together some images from Halo and Halo2 with quotes from Marathon and Marathon2 and now I have got a few desktops. They are not too involved, but some look cool. They are all in 1024 x 768, if you want a higher resolution I can probably cook one up and email it to you.
Enjoy
Screenshots taken from:
http://bungie.com/games/
http://img232.exs.cx/my.php?loc=img232&image=tru7hcopy3oo.jpg
http://img232.exs.cx/my.php?loc=img232&image=legendaryb42ts.jpg
http://img232.exs.cx/my.php?loc=img232&image=wstm9mg.jpg
http://img133.exs.cx/my.php?loc=img133&image=legendaryb50xv.jpg
http://img155.exs.cx/my.php?loc=img155&image=lazyboy3pl.jpg