Flag of Opportunity is a trinket in Glacier's Laboratory, a mod for The Binding of Isaac.

Upon entering next floor, if in-game timer has one or more number 5 (except XX:XX:X5), teleports Isaac to a special area with free rewards.

Isaac cannot return to the area once he leaves.

The following special synergies and interactions for Flag of Opportunity have been documented.

* Note that not all possible synergies and interactions are listed here.

• Download Glacier's Laboratory from the Steam Workshop.