Zoo Keeper is a legendary match-3 puzzle game that gained fame for its addictive gameplay and charming pixel art style. Players must swap adjacent animal tiles to align three or more of the same species to clear them from the board. The game offers various modes including Quest, Survival, and a competitive 2-player mode. With its fast-paced 'Active Chain' system, players can continue matching while tiles are still falling. Easy to pick up but difficult to master, Zoo Keeper is a quintessential NDS title that perfectly utilizes the touch screen for quick-fire puzzle action.