ACE Team's first-person melee fighting game Zeno Clash is on sale for only $3.75 over at Steam today (original price $15). Previously-released free DLCs like the Zeno Clash model pack for Garry's Mod and three new levels for the challenge towers (called 'The Pit') are also included in this bundle.

Another one of Steam's daily specials worthy of a mention is Audiosurf, which is currently on sale at $2.50 (original price $10). Both offers are valid for today only, so if you haven't bought either game yet then here's a great opportunity to do so at ridiculously discounted prices.