In Catacombs of Atheria, the game now throws in a fun press-your-luck mini game known as the Catacombs. You will need to manage your energy to get in and out of there before you pass out and lose what you earned.
The Catacombs is not the only new addition to the game. This expansion also includes more customization for your heroes. Now when your Hero levels up to a certain level, they will have the choice between 2 (Hero specific) additional classes giving them new abilities.
Speaking of Heroes, the expansion also comes with 2 new heroes - The Bard and The Summoner.
Also, new dungeon tiles, events, and artifact cards are added for more things to find, equip, and explore. Why make the Lost Pixel your only quest? Now I have introduced 20 Side Quests to the game. You will be given 3 random Side Quests at the beginning of the game so you can gain more Items and XP as you accomplish each.
Lastly, now each floor of the dungeon comes with 1 Boss Monster. These monsters are devastating, but if you are willing to fight and defeat them, the reward is great!
—description from the publisher