Steam, Tracks, Trouble & Riddles (S.T.T.&R.) is a single player adventure mod, based on source engine (Orange Box) by Valve. It combines two types of game play: an adventure game with complex, 3D-interactive riddles in a fantastic environment and a simulator for track based vehicles.
This is the first demo video of the single player adventure mod “Steam, Tracks, Trouble & Riddles”
presenting three of four vehicles player may drive and find the final goal “the secret wagon”.