Had a little go with this game, it's a 3rd person shooter/pvp, free to play. Humans vs vampires so asymetrical classes. The vampires are able to climb and jump everything with some evasion, ambush and damage reduction abilities, while the humans have ranged weapons and some ablities for area denial (from what I can tell) Makes for a pretty good game I think.
Only catch is you have to rank up to unlock every class, which is pretty dumb because you can just pay for them
I think you unlock a 5th an 6th class very quickly based on how quick you gain your first ranks. That said it's still worth checking out.
http://store.steampowered.com/app/200110