Being an avid fan of the Extra Credits channel on YouTube, I just watched an episode (from late last February) about this very topic. https://www.youtube.com/watch?v=aJCEQaSlvHE.
The question is not about the "psychology" of roleplayng, but how it applies to video games specifically, and what about them gets us "roleplaying."
They use some great examples from games and just thought I'd start a topic on the oft discussed Role Play aspect of gaming
Some of their examples were Deusix: Human Revolution where if we do not go save the hostages they die, or Chrono Trigger later on having the character placed "on trial" with their actions throughout the game highlighted, like breaking containers, stealing food, and the like.
What is it about games that gets you into your character? Any fun examples?