Twilight's Fall – a separate game. Twilight Imperium's expansions, mods and rules topics are not part of it.

Reverse Engineer

After another player discards an action card that has a component action: Take that action card from the discard pile.
Action card

After another player discards an action card that has a component action:

Take that action card from the discard pile.

1in the deck
–chance to draw
Nocomponent action

Source: Prophecy of Kings

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tirules.com
  • Reverse Engineer may be played if the action card is discarded after being played or cancelled, if it is discarded due to hand size limits, or if it is discarded for another game effect.
  • It is public knowlege which action cards a player takes using Reverse Engineer.

Interactions

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Spy

  • If the targeted player has Reverse Engineer in their hand, they must first give a random action card to the player who played Spy. Only if the card they gave was not Reverse Engineer may then then play it to take Spy into their hand from the discard pile.