Realm Shift is a first-person shooter where the player must use their ability to change modes which switches between two separate realms. The player is given a variety of guns that also have different rarities making them more powerful, they must utilize their weapons and dash ability in each realm to eliminate the enemies that reside there in order to progress to the next stage. Each room that is cleared will grant the player the upgrades of their choosing.
The game will last as long as the player can survive.