One Block Wide is a gamemode added on January 14, 2025. It is like Survival, except one Block wide, making the players unable to travel along the Z axis. One Block WIde used to be called "Two-Dee" but was then renamed because it was too confusing.
Getting meat is almost impossible in One Block Wide, because once attacked, the mobs just fall right into the void.
January 14, 2025: Added to Bloxd.io for a Limited Time.
February 18, 2025: Removed from the main menu.
March 20, 2025: Re-added as an option when creating custom Open-World lobbies and Custom Games.