The device used to relive genetic memories in Assassin’s Creed is called the Animus.
In the series’ modern-day storyline, the Animus allows a user to experience memories inherited through an ancestor’s genetic lineage. Desmond Miles first uses the machine under Abstergo’s control to access Altaïr’s memories in the original game.
The device provides the framework for moving between historical settings and the contemporary plot. It also explains why characters can revisit events from different centuries without the story presenting them as ordinary time travel.
The Animus is fictional and does not read memories from a person’s literal DNA in real-world science. “Helix” is another fictional technology associated with later Abstergo products, while Eagle Vision is an Assassin ability rather than a machine.