[Sarabveer]

Originally Posted by Powerlord The SteamTools extension is built against OpenSteamWorks The SteamWorks extension is built against Valve's SteamWorks SDK (and includes some of the redistributable files from version 1.2. More importantly, though... SteamTools is only guaranteed to work on Team Fortress 2, while SteamWorks should work on any Valve game.

What he said.