After 24 Years, Someone Finally Achieved 100% Completion of 'Doom II'

After 24 years, someone finally discovered the last remaining secret in Doom II, earning the first 100% completion of the game without using cheat codes. Doom series co-creator John Romero took to Twitter on Friday announcing YouTuber Zero Master uncovered how to unlock the last of the Industrial Zone's ten secret areas. Fans have long known where it is, but nobody has been able to activate it without using cheats, so no one has ever been able to claim a 100-percent completion of the game. Until...