You need Descent 2 version 1.2 to play HOARD and to see custom textures.
Single Player - No
Cooperative play - No
Anarchy - umm...duh
Team Anarchy - Sure why not..
Flag - Yeah I guesso..
Hoard - HELL yyyeeeaaa"This level is, well.. damn cool I think. Mostly thanks to the great textures and especially thanks to the great lighting."