D'artagnan, or Dart for short, was the original protagonist concept planned for Psychonauts. The main character was changed during development to Razputin, due to difficulties with animating Dart's hat. They also feared that the sway of the hat would be confused with a ponytail and people would think Dart was female.
D'Artagnan wears a green striped sleeping cap, a blue jacket, brown trousers, beige stockings, and brown shoes. He also wears a backpack. His skin is blue, his eyes are orange, and his hair color is unknown.
- When Coach Oleander tries to probe Raz's mind in the opening, he says that Raz's name starts with a "D", referencing Dart.
- Dart can be seen in the final slide of Coach Oleander's primal memories, where he is shown traversing the Basic Braining obstacle course.
- According to the Psychonauts retrospective, The Color of the Sky in Your World, he was re-designed due to being too odd-looking among the rest of the cast of characters.
- It is believed that Dart would have been more cynical than Raz. Compared to more optimistic and friendly Raz, the dialogue used for Richard Horvitz when he auditioned for Dart had him look down on the camp and campers for focusing on mental basket weaving and themselves instead of trying to become Psychonauts.