If you want a block-based building game with RPG mechanics and native multiplayer, the best bet is to use Minecraft with an RPG-focused modpack. For a polished, standalone experience, Starbound offers a fantastic 2D co-op sandbox RPG adventure.

Designed from the ground up as a massive multiplayer online (MMO) experience, Cubica features:

: Seamless interaction between PC, Android, and iOS players on a unified engine.

If you need help setting up a specific method, please let me know: What are you playing on? (PC/Steam, Android, iOS) Do you prefer co-op split-screen or separate computers ?

What are you playing on? (PC/Steam, Android, or iOS?)

: Integrated party systems for up to five players, a detailed class skill tree, stat leveling (Strength and Intelligence), and anti-griefing land claim protection blocks.

: Cubica is designed specifically as an MMO version of the Block Story concept.

: Early versions of Block Story featured an experimental multiplayer mode, but development shifted focus toward expanding the single-player RPG elements.