This game is not what you usually see on Steam. In Garry's Mod, you enter a physics sandbox which provides you with tools to make what you want happen and leaves you to it. You can play alone or join thousands of other players kidding around and playing with physics. If you do try this game, do check out its Steam Community Workshop

Garry's Mod or GMod (stylized as garry's mod) is a sandbox physics game using a modified Source engine, created by Garry Newman. Garry's Mod was originally a modification, a "mod", for Valve's Half-Life 2, but was later made into a standalone game. I ...   more on Wikipedia

You think that you’ve got what it takes to make it as a leader of an empire in the medieval world? Redeem your copy of Total War: Medieval II and prove it! In this Creative Assembly strategy title you will be taking on the responsibility of building cities, training armies, and taking them to war! Engage in battles where thousands of brave warriors collide and stamp your authority over the region!

Medieval II: Total War, the indirect sequel to 2002's Medieval: Total War and the fourth game in the Total War series from The Creative Assembly, is a game of turn-based strategic rounds and real-time tactically-oriented battles, released in November ...   more on Wikipedia