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.

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Half-Life 2: Episode Two Icon
Platform
Windows
Developed By
peegee1
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Official Page
Animationdesign.de
Release Date
TBD
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