ToME: the Tales of Maj'Eyal

Add a special arena mode where each wave is actually a boss fight from the main game. Unlocked by beating the Arena once. Winning the boss chain fight would grant the achievement "Like a Boss!"

This sounds highly entertaining.

I support the idea too. Perhaps each boss should also drop a lot of equipment to make it more interesting. Adding a randboss every once in a while can spice things up.