System Shock 2 opens with playable character creation that also functions as a tutorial. Your trainee goggle-wearing badass walks off the street into a recruitment center and signs up to be a marine, or an engineer, or a psychic black ops agent. Then you choose where you'll be posted for each tour—decisions that alter your stats—and an instructor teaches you how to use your abilities.
Which created an unexpected problem for Nightdive when it came time to do one of its Kex engine remasters, as lead producer Daniel Grayshon explained in a recent episode of Nightdive's Deep Dives. Because System Shock 2, unlike some of the early FPSes Nightdive has remastered, was fully voice-acted.