I Regret Nothing

I Regret Nothing is an achievement in Halo: The Master Chief Collection. It is unlocked by beating the 15 minute par time on the level Regret. The achievement is worth 10 Gamerscore and can be unlocked on any difficulty.

Trivia
The name of the achievement is a reference to the meme of the same name; it may more specifically be a reference to the line's use in the Red vs. Blue episode "Best Laid Plans".