

The glass tube can be raised using the crank-wheel, but working out how to solve it can be tricky. This appears to be two machines beside one another, one with a vertical glass tube and the other with an array around a middle isolation chamber. The Residuum Experiment can be found inside the Annex in The Complex. Solving the Residuum Experiment requires taking a Residuum sample from the Control Center to the Annex, while fighting a whole lot of Eternalists – not an easy task if you don’t come prepared. This can be first found at the very start of the game, in Wenjie’s Laboratory Annex, but it’s a good idea to hold off on doing this one until you’ve got some resources.

The Residuum Experiment is an interesting mystery to solve in The Complex in Deathloop.
