In Subvein,you can get all kinds of kickass unlocks that make you look cooler, more pro, or to make you more menacing, but, none of these are breaking the balance between a player that has them or not.
In order to get these, you have to get community credits (CC).
The unlocks range from new skins for weapons and sounds that indicate you made a triple kill, to skill tokens that let you redistribute your skill points.
Ahh,the smell of decapitated mutants in the mornin',now only if those mutants were zombies(HINT HINT)
Oh look,it's our lovely bencelot,boasting over his shiny medal!