Thinking with Time Machine

Thinking with Time Machine is a Portal 2 modification featuring a new gameplay element known as the "Time Machine" which allows the player to record and play back their actions in the game world.

Mechanics

 * "Time Machine" device
 * Accurately recreates the player's actions. Activated by hitting the R (default) key, then the Q key to stop. The F key activates the mechanic and enable the Machine to start replicating the actions.


 * Anti-gravity buttons
 * These are first introduced in Test Chamber 5. They come in the form of regular buttons (Sphere, Cube, etc) on the ceiling. By letting go of a Cube or Sphere close to it it will slowly move towards it and finally activate the button. These only appear once and for people playing the game for the first time will have trouble with it due to no training on how the buttons work.