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 shunter is based on a real rare locomotive called KA 4013 and
served from the 30ties to the 60ties in Germany.
It will be a part of Chapter One V2.