It looks like you're referencing a release filename for the movie Unstoppable (likely the 2024 biopic about wrestler Anthony Robles, or possibly the 2010 train film).

A temporary state in which a user or character cannot be interrupted, disabled, or stopped by external negative effects (e.g., stuns, slows, knockbacks, traps, UI blockers, or forced inputs).

If you want a named "Unstoppable" (like a software feature, game mechanic, or product capability), here’s one possibility: Feature Name: Unstoppable Mode