Games like Orion Sandbox

Lurkers is a chaotic 2D multiplayer sandbox where you can build, battle, and survive! In common: sandbox, role-playing (rpg).

Cataclysm: Dark Days Ahead (aka Cataclysm DDA or CataDDA) is an open source survival horror roguelike set in a post-apocalyptic and fictional New England. In common: sandbox, role-playing (rpg).

Blossom & Decay is an open world socio-economic simulation where thousands of players may create their own unique stories by influencing each other’s gameplay… In common: sandbox, role-playing (rpg).

A Life Simulation game with heavy RPG elements where you play as a Cow exploring, leveling up, and completing quests. In common: sandbox, role-playing (rpg).

A dark fantasy role-playing game set in Valdaria, a perilous world ruled by gods and monsters. In common: sandbox, role-playing (rpg).

Taming.io is a 2D survival game taking place in the wild forrest. In common: sandbox, role-playing (rpg).

This is a sandbox / rpg game similar to games like Terraria. In common: sandbox, role-playing (rpg).

As one of the last human survivors, you find yourself stranded on an uninhabited island. In common: sandbox, role-playing (rpg).

Explore cosmic worlds, build unique bases, and battle for resources in this browser-based sandbox game. In common: sandbox, role-playing (rpg).

HighSpell is a browser-based, fantasy MMO inspired by the late and beloved Runescape Classic. In common: sandbox, role-playing (rpg).