Terraria (テラリア) is a Nintendo 3DS game published in the USA by 505 Games. It is a sandbox-style action-adventure game in which players explore, build, and battle enemies in a randomly generated 2D world. The game is set in a randomly generated world filled with monsters, NPCs, and resources. Players can explore the world, build structures, craft items, and battle enemies. The game also features multiplayer capabilities, allowing up to four players to explore and battle together. Players can also customize their characters, build their own worlds, and share their creations with others. Terraria offers a unique gaming experience that is sure to appeal to players of all ages.