The feature of the mode is "open monetary parts of the game", which include:

Endless number of Dreamland Planes, for the players who feel Eldritch Plane is too easy
Ten new Perks: 2 EPICS
Four new Weapons: including Teslazi, a submachine gun supreme
EPIC version of each and every weapon
Collect Eldritch Signs for crystals
More choice when leveling up: 3rd perk slot
Two new Abilities: Homing Pigeons!
Two new Powerups
Two new Inventions
Two new Monsters: Cultists & Mi-Go