Simulacrum

The Simulacrum is an infinitely scaling wave based alternative game mode that is new to The Survivors of the Void update and DLC.

Each wave spawns enemies depending on the Director's credits. Every 5th and 10th wave will be a boss wave and after completion moves you to a new location on the current map. After 10 waves you move to the next environment. Outside of the bubble provided, you take damage equivalent to  every 0.2 seconds, where   is the amount of times you've been damaged by the void fog, and   is your.

Upon entering the game, you will spawn next to the Assessment Focus, activating the Assessment Focus initiates the game mode. Upon completing a wave, a Void Potential drops for each player and a 10 second timer starts for the next wave. Modifiers can also appear in waves known as Augments.

Items that activate during the teleporter event activate during the waves.

As of version 1.2.1.0 (release) the game mode is bugged and has a chance to cease enemy spawns, causing a soft lock.

Augments
Augments are modifiers that can trigger on waves in the Simulacrum that can determine the monsters that spawn as well as enabling and disabling artifacts. The rarity of item you receive can also be determined by an Augment.