It would be nice if it happened more often, but it does happen enough that there's a whole Wikipedia list: https://en.wikipedia.org/wiki/List_of_commercial_vide

It would be nice if it happened more often, but it does happen enough that there's a whole Wikipedia list: https://en.wikipedia.org/wiki/List_of_commercial_video_games_with_available_source_code https://en.wikipedia.org/wiki/List_of_commercial_video_games...