What are procedural generation games?

Procedural generation in games means content is created algorithmically rather than designed by hand. Instead of playing through the same fixed level, procedural games generate unique layouts each time you play. Examples include endless runners with randomized obstacle placement, puzzle games with procedurally generated boards, roguelike games with new dungeon layouts each run, and card games with randomized decks and hands. Benefits include infinite replayability - no two games are exactly alike. Increased challenge - algorithms can create complex scenarios designers might not think of. Discovery - players feel genuine exploration of the unknown. Drawbacks include potential for unfair or unplayable generations, and sometimes less polished feel than hand-crafted content.