Super Mario Bros. speedrunners have discovered a major glitch in the game that allows players to manipulate code on the fly.

World 1-1. We’ve all run, jumped, and brick-bashed our way through that familiar first stage. It seems so simple and second-nature to us now, but in this modern age of iterative entertainment, it is ...

By meeting a specific set of conditions, including activating Second Quest, ACE can be achieved in Super Mario Bros. 1.