Here are some custom maps I have made for Halo custom edition.
My seconded map. It's not to small but then again it's not big. To use just place the grunt_gound.map file in your halo custom edition/maps folder. Like...
This is my first Halo map I have made. It is a small MP map. Made it back in 2010 or 2011 I think. How to use, place the spiral.map file in your, halo...