Re: Sin Episodes Source SDK?
I was playing around with that exact idea the other day. Unfortunately it doesn't work since the Source SDK on Steam is for a newer version of the Source engine than Sin is currently running on. It is possible to set it up so you can simply make maps with our assets, but you can't compile them and have them run in our game right now. The game will just spit out an error about how the bsp version is too high. You might be able to run it in HL2, however.