Player characters in ROSE Online, known as the "Visitors" are being sent to protect the seven planets that were once brilliant and beautiful until a vengeful god stole one and threatened all of the others. There is a pretty typical grind to the current level cap of 210, featuring quests and storyline missions, as well as hunting.

The game also features a player-driven economy, as well as a concentration on PvP at the higher levels. There is even a giant mech a player can operate and take into battle. ROSE Online, due to changes in developers, may not be completely consistent among all of its servers throughout the world.