Thinking with Time Machine

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Thinking with Time Machine
Publisher(s)SignHead Studio
Platform(s)Windows, OS X, Linux
ReleaseApril 18, 2014
Genre(s)Puzzle platformer

Thinking with Time Machine is a single-player mod for Portal 2 developed by Ruslan Rybka, also known as Stridemann, and released by SignHead Studio. It was initially released to Steam on April 18, 2014, for Microsoft Windows, OS X, and Linux systems, available freely to users who own Portal 2 on Steam.


Like in Portal, Thinking with Time Machine gives the player the Portal gun, and puts them in the same environments and with many of the same testing elements. However, the player now also has a device known as the "time machine". The device allows the player to record their movements, and summon a double who performs those motions.

Most of Portal 2's testing elements are included in the mod, and new elements are shown through an instruction board. For example, it teaches the player that crouching down as a clone will let the character jump on her later. If the clone stops crouching when the character on it, they are pushed up a little and can jump higher.


Alice O'Connor of Rock, Paper, Shotgun said of Thinking with Time Machine "For those lacking in some of the social niceties, it’s perhaps the closest we’ll get to playing Portal 2 co-op.”[1]


  1. ^ O'Connor, Alice (2014-04-23). "Portal 2 Mod Adds Time-Travelling Legs". Rock, Paper, Shotgun. Retrieved 2017-11-09.

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