If Commander Shepard enters the hot labs at Peak 15, Yaroslev Tartakovsky is sitting on a chair, and has an unidentified condition that appears to weaken him. Why he is still there despite working elevators, or how he survived the rachni attack, remain unanswered questions.
Tartakovsky tells Shepard about Binary Helix's finding of a rachni egg aboard a drifting rachni ship. Binary Helix planned to clone the rachni and mass-produce an army: the egg they found was, however, a queen, and they chose to separate her children from their mother in order to make them more obedient. This did not work, with the rachni being driven insane without her presence.
Yaroslev has the codes that Mira can use to activate a neutron purge, but as soon as he rises to give them to Shepard, he is impaled through the chest by a Rachni Soldier. Shepard kills the rachni, then takes the codes from Tartakovsky's body. As Tartakovsky says wryly not long before he dies, "mother always said I would come to a bad end."
- A designer on Mass Effect has stated on Bioware Community Forum that "When written, Tartakovsky was supposed to be sitting on the floor with one leg torn off, kept alive by a tourniquet. A year later, we were told that wasn't technically possible."
- The code for the neutron purge that Shepard receives from the body of Tartakovsky is 875-020-079. This particular sequence is featured in an episode of the original Star Trek, "The Mark of Gideon", as coordinates given to Captain Kirk. The episode in question, fittingly, deals with killing the youth of an overpopulated planet.
- This character has the same surname as Genndy Tartakovsky, a famous Russian-born animator who is behind series such as Dexter's Laboratory, Samurai Jack, and Star Wars: Clone Wars.