The name says it all

Most of you have probably not heard of this HL2 mod. In short, its a deathmatch mod with innovative wallwalking gameplay. Its an excellent mod, and recieved high praise. From the few who played it. Word never got out about this mod, and has since died. We are going to spread the word about this mod by inviting people to this group and by simply telling your friends about it. We need a few different things, but one is participation. You will not regret playing this mod. Period.

Ballmen Forums[dwmh.net]
Moddb Page
Ballmen Website[www.ballmenmod.com]