TI4 Rules DeskTwilight Imperium 4
Living Rules Reference · v2.0
3

Action Phase

Marked text is printed in red in LRR v2.0 (new or changed with Prophecy of Kings)

During the action phase, each player takes a turn in initiative order. During a player’s turn, they perform a single action. After each player has taken a turn, player turns begin again in initiative order. This process continues until all players have passed.

During a player’s turn, they may perform one of the following three types of actions: a strategic action, a tactical action, or a component action.
If a player cannot perform an action, they must pass.
After a player has passed, they have no further turns and cannot perform additional actions during that action phase.
  1. During a turn that a player passes, they can resolve transactions and “at the start of your turn” abilities.
  2. A player that has passed can still resolve the secondary ability of other players’ strategy cards.
  3. It is possible for a player to perform multiple, consecutive actions during an action phase if all other players have passed during that action phase.
A player cannot pass until they have performed the strategic action of their strategy card.
  1. During a three-player or four-player game, a player cannot pass until they have exhausted both of their strategy cards.
After all players have passed, play proceeds to the status phase.

Source: Twilight Imperium: Fourth Edition — Living Rules Reference v2.0 (September 22, 2020), page 8. Rules text reproduced verbatim; the rulebook’s diagrams are omitted.