You must complete each of the three Agency tests, which will become available in Recursion mode. The test requires fighting a clone of yourself in the layout of your choice. Switch cannot be used and area of effect upgrades, for example, +Load() are not needed since you will only face one opponent. Use a high damage combo such as Void() three times followed by Cull() + Cull() + Void().
Enter the Sandbox Practice Test. You will have five enemies for practice. Use Get() to place them into a cluster, then hit them with a high damage combo in Turn(). For example, use Void() three times followed by Mask() + Mask() to boost damage, then follow up with Cull() + Cull() + Load().
There are sixteen functions. Some are looted from dead bodies and the others are avaialble through leveling.
Explore every area of the map. If you miss any, try again in Recursion mode.
Activate a limiter for at least one encounter, and it will update with some background information. Read this background information for each of the ten limiters.