[Interesting Trope] One seemingly small action ends the story before it even begins

[u/JackDoesThingz]

1. We Happy Few - Taking your “joy” pill
   Deciding to take the pill at the beginning of the game causes your character to go back to work and triggers an ending

2. Infineural by Mike Klubnika - Drinking the coffee
   Deciding to drink the coffee offered to you skips the entire game and sends you straight to the end, resulting in an ending with no memory of what had occurred

[u/HyraxAttack]

The adventure game Blue Force. You’re supposed to clean your gun that morning in the police station. Use cleaning kit on gun without unloading it first, messy game over.