Halo 3: Mythic Overhaul Mod - 4K - Sierra 117 - Legendary Playthrough (Co-op) 

This mod is a complete sandbox overhaul for Halo 3. The goal of the mod is to expand the sandbox and provide more gameplay variety for halo 3. You'll find new weapons and vehicles, run into new encounters and enemies, and experience a fresh take on Halo 3.
Subscribe for more content!