Halo Combat Evolved
Spade6179 has given us a background pack. It contains pretty pictures of CE maps that you can use as your backgrounds.
25 wallpapers in 1280x1024 and 1024x768 from CMT's single player mod captured by Agammenon.
A Halo wallpaper made using Unreal Tournament 2004 and some Skin Packs.
A wallpaper of an elite.
Halo 3 wallpaper Made by Woolybear - Woolybear@censattwb.com
These are text fonts for Windows, They work fine for Windows ME, 2k and XP. I don’t have anything older than that so I cannot say whether they will work or not.