Choosing an ending in game with multiple endings by last minute dialogue choice or decision.
In games that feature Multiple Endings oftentimes players is given ending chosen on the basis of his decisions and actions throughout the game. In others you just reach the Endingtron 3000, a mysterious machine that will play one of the endings depending on which button you press. Some games mask it's presence by making a critical decision look like a part of a dialogue with NPC or choice of doors, maybe a path. This trope is at work whenever an ending of the game hinges on a single choice made by player at the very end of the game. It does not necessairly mean that previous choices have absolutely no bearing on the ending - they may change some details, but the last second decision will be always that one, most deciding factor. Named after the description of this trope instance in Deus Ex: Human Revolution by Yahtzee As with all Ending Tropes, beware of spoilers.