We've taken our deathmatch servers and made them Free For All! They still have the same SourceMod Deathmatch plugin and the same steady tickrate and good registry, but now twice as many people to shoot at. And if you really want a challenge, choose de_cache in the next map vote - it's monstrous.
64 tick FFA Deathmatch: 188.8.131.52:27019
128 tick FFA Deathmatch: 184.108.40.206:27018