CatsEyeXI is a Final Fantasy XI private server built around level-75 gameplay with three distinct modes: CatsEye Accelerated, Crystal Warrior and Wings-Era Warrior. The official site highlights custom quests, Ventures, endgame systems and modern quality-of-life improvements while preserving a classic-era focus. Account creation supports separate game accounts for the different modes; ACE uses 1.5x EXP, while Crystal Warrior and Wings-Era Warrior use 1.0x EXP.