You won't be able to run Steam without Wine which is x86-only. If Terraria wasn't distributed through Steam, and as such was dependant on SteamWorks, then you would be able to run it through Mono, which is more platform independent. But IIRC Terraria refuses to launch if you don't start it from Steam, so you have to get that running too.
Damn.Is there a way I could emulate the steam launcher in some way?
That would be borderline piracy.
I'm confused. Why? Steam is free so it's not like they'd loose anything from it, but if you're right I won't do it because I'm a good person (I think). D:
Macs.
I'm assuming you live in the US.Steam is the DRM. According to the DMCA bypassing the DRM is illegal/piracy. The same also applies for many other countries' copyright laws.
I'm actually in the UK, but if it's illegal I won't do it.
Just incase I ever need mono for something else, which version should I use for my ppc?