With the Animus? [Oh, thinking about Baby puts her right back into action mode alright.]
It was initially designed to relay memories pulled out of subject DNA for replay and analysis. It relies on synchronization to work best which usually related to getting people used to the controls and immersing them in easier memories at a stable time point before moving forward to more complex ones so that they weren't experiencing a disconnect and then, literally, disconnecting. We'd use the memory data collected for analysis.
[...] When Lacus was around she and I rigged up a lot of the Animus's systems to function as a VR simulator, using the same technology in a more portable fashion. Some of it's been lost in translation but no matter what I know how to work Baby, the Animus, so I can keep her optimal and recode what I have to. But the VR uses the functionalities to replicate whatever we want to design digitally while also tapping into the nervous relays to make it... feel real too. There is a downside though. To the Animus.