: v0.7.1 was missing several biomes, the final boss encounters, and many of the weapon modifications now standard in the game.
: The game is designed for 1-4 player co-op. Official versions through Steam or Nintendo eShop provide seamless matchmaking and stable "Epic" lobbies that cracked versions cannot access.
: Legacy versions do not receive bug fixes, often resulting in game-breaking crashes during deep runs.
: Files hosted on third-party "abandonware" or "free" sites for modern indie games are frequently bundled with trojans.