Titanbreaker is a PVE dungeon for 5 players with saved character progession, meaning that you can save your Items and Hero level and continue at a later point. Titanbreaker is the continuation of Temple of Dreams. The Dungeon consists of many zones, each with a unique environment and unique bosses. Progressing into higher zones, the dungeon will become increasingly harder. Also there are unique Items only available in PVE. A partial list of those Items is listed at the bottom of this page.
Also, there is a ranking showing the best Titanbreaker Players:
Titanbreaker - Hero Rankings - Season 1
Titanbreaker - Hero Rankings - Season 2
Titanbreaker - Hero Rankings - Season 3