Backtracking in a game is boring - there's just no denying this fact. In this featured video, Extra Credits addresses this issue, pointing out pitfalls to avoid, and providing numerous methods of designing levels so that backtracking isn't a necessity.
Forcing a player to backtrack through an empty level after they've defeated everything inside it is bad level design. Level designers have several tools to address this problem, which can be easily avoided if the game design team plans for it.
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