User blog comment:HarmonTower805/Happy Tree Friends Battle: Episode 1- All that Glitters is mostly NOT worth it, it's mostly lame/@comment-5201601-20141130142117/@comment-5201601-20141130145732

Yes. They are mods of Counter-Strike: Source. I always play with friend but they cannot see it because it a local mod not whole server mod. I'm wondering why people didn't released HTF characters in GMod. A game there you can do everything(sandbox).