Developer Eastern-Willow214 has released an early build of "Terraria Unbound," a modification that transforms the game into a three-dimensional experience, available via tModLoader. The mod features a 2304-block high world and retains core mechanics like resource gathering, building, exploration, and combat. It includes multiplayer functionality but is in an "experimental" phase, with potential bugs and compatibility issues. The mod can be accessed through the Steam Workshop for free, and future updates may support popular mods like Thorium and Calamity.