- NEW Island - the majestic Magical Sanctum
- NEW Magical Monsters - Xyster, Knucklehead, Frondley, Déja-Jin and Larvaluss
- NEW Magical Monsters coming every 2 weeks
- Single-Element Monsters added to Market on Ethereal Island
- Ability to send Keys to Friends directly from the Friends Menu
- Streamlined Battle Tutorial on the Colossingum
- NEW Versus and Champions' Guild battle modes - win competitive Matches to improve your Rank and win great prizes
- NEW Friendly battle mode - face off against your Friends just for fun
- NEW Jukebox feature in the Mess Hall - unlock new tunes
- NEW Decorations exclusive to the Colossingum
- NEW Avatar feature - choose a Monster portrait to represent you in the Options Menu
- Costumes available to buy on other Islands in the Monster World
- StarShop added to Shugabush and Ethereal Islands
- Current and previous weeks' Versus Mode Champions in the Rank menu on the Colossingum
- Improved interface for secondary Currencies on Island display
- Ability to Teleport Monsters to the Colossingum from more Islands
IN UPDATE 3.1.0:
Source: Steam Community (opens in a new tab)