Are there plans to put the rest of the Toribash achievements on Steam?
Because at the moment, it it just the belt achievements.

I agree, only belts achivements , we want the rest of them in steam.

is that important?

Seeing as the game is "completed", and there aren't really any new major features being added any time soon, I'd say this is a reasonable suggestion.

This would make more sense if Toribash items were bought and sold on the Steam marketplace, seeing as a good number of them are "get full [insert colour here]", a few more are "get this collector item", a few more relate to events that happened two years ago, and the rest can actually be achieved in game.