Terraria (prontəˈrɛəriə) is an action-adventure sandbox game developed by Re-Logic. The game was first released for Windows on May 16, 2011, and has since been ported to several other platforms. The game features exploration, crafting, building, painting, and combat with a variety of creatures in a procedurally generated 2D world. Terraria received generally positive reviews and sold over 44 million copies by 2022, making it one of the best-selling video games. Terraria is a 2D sandbox game with gameplay that revolves around exploration, building, crafting, combat, survival, and mining, playable in both single-player and multiplayer modes. The game has a 2D sprite tile-based graphical style reminiscent of the 16-bit sprites found on the SNES. The game is noted for its classic exploration-adventure style of gameplay, similar to games such as the Metroid series and Minecraft. The game starts in a procedurally generated world, with players starting out with basic tools and a non-player character (NPC) guide to get them started and bring their attention to aspects of the game and progression. The game's world is made up of several layers of tiles that players can interact with and modify. Many resources, such as metal ores, can be found while exploring caves. Players begin with low health and mana, which can be increased by finding and crafting specific items. Some resources may only be found in specific areas of the map, stored in common and rare containers, or dropped by certain enemies. Players use resources to craft new items and equipment. Different recipes require different resources and crafting stations. Several items in Terraria create complex crafting trees involving a large amount of items to create a single powerful piece of equipment. Players have the option to customize their character's appearance when creating a new character, and in-game by visiting the Stylist NPC or the Clothier NPC. Along with that, players can obtain vanity items, which are special armor pieces and accessories with only a cosmetic effect, and dyes to change the color of equipped armor or accessories.