Procedural content generation is the algorithmic creation of game content such as levels, terrain, or items, often driven by a seed and generation rules rather than handcrafted layouts. By feeding a seed into generation algorithms and using constraints, games can produce large, varied worlds or experiences with less manual design effort. The process can be deterministic, meaning the same seed yields the same world, which helps with sharing seeds and reproducing runs. Techniques include noise functions, tiling, fractal methods, and rule-based placement that together create coherent, playable environments while keeping exploration fresh. This approach isn’t about manually designing every level, nor is it about generating the player’s choices during gameplay, or automatically producing cutscenes. It centers on creating the game’s content that shapes the game space—maps, layouts, items, and resources—through algorithms.