Cubic Odyssey is an open-world action-adventure game that places players in a vast, procedurally generated universe. The core gameplay loop involves exploration across diverse planets, resource gathering, and crafting. Players engage in combat against the "Red Darkness" threat, a galactic plague that mutates life and consumes worlds. The game also incorporates RPG elements, allowing for skill progression and character customization through player choices.

Seamless traversal between ground vehicles, air travel, and spacefaring is a key mechanic, enabling exploration from planetary surfaces to interstellar distances. Cooperative play is supported, allowing multiple players to tackle challenges together, from battling large enemies to constructing shared bases and megastructures. The narrative centers on uncovering ancient mysteries and combating the Red Darkness to save the galaxy.