Designing and developing levels in a game is no walk in the park. That’s true even if you’re a professional but even more so if you’re just getting started. So you can imagine the creativity, hard work, and old-school persistence of Doom modder Ben Mansell, who poured no less than 300 hours making a Doom 2 level. Yes, a single Doom 2 level. But don’t let that lone digit fool you, because that very same single level will take at most 3 hours to finish.