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Thinking with Time Machine

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Thinking with Time Machine

SignHead Studio

Release date(s)

April 18, 2014




Microsoft Windows, macOS, Linux



System req
  • Windows:

Windows XP, Vista or 7 operating system, Intel Pentium 4 3.0 GHz or 2 GHz dual-core processor, 1 GB (XP) or 2 GB (Vista, 7) RAM, DirectX 9.0 compatible video card with 128 MB of VRAM, Portal 2 installed

  • macOS:

Mac OS X 10.6.7 operating system, Intel Core Duo 2.0 GHz, 2 GB RAM, NVIDIA GeForce 8600M, ATI Radeon HD 2400 or Intel HD Graphics 3000 video card, Portal 2 installed

  • Linux:

Intel Core Duo 2.0 GHz, 2 GB RAM, NVIDIA GeForce 8600M, ATI Radeon HD 2400 or Intel HD Graphics 3000 video card, Portal 2 installed


Keyboard and mouse




Ruslan "Stridemann" Rybka

Thinking with Time Machine is a Portal 2 modification that introduces new time-based mechanics in addition to the standard Portal Gun. It was released on April 18, 2014 after being Greenlit on Steam in March of the same year.


Thinking with Time Machine continues the story of Portal 2 with once again Chell as the protagonist. After an unexpected and somewhat confusing twist, which involves a crow breaking the illusion of an open world by flying into a giant screen, Chell finds herself back within the Aperture Science facility. Soon, she acquires a new PDA with the ability to record and playback a series of actions as a means of solving test chambers.

After the tutorial level, the player comes across an unsolvable test chamber. Interacting with a switch results in a gramophone falling out of a Vital Apparatus Vent, followed by the Borealis crashing through a wall. Shortly after, Chell enters the Central AI Chamber, discovering that GLaDOS was shut down by Atlas and P-Body.

The player is then challenged to complete nine test chambers that utilize the mechanics of recording and playing back a copy of Chell to repeat actions and complex sequences. The story ends with Chell going back in time to a point not long before the end of Portal 2, and meeting up with GLaDOS.

Test chambers in Thinking with Time Machine are kept in a futuristic, Tron-like style. The modification features new animations of dispensing various cubes, and an anti-gravity system, which is used occasionally during the puzzle sequences.

External links[edit]