Top five games, but going by chronology, not order.
1)Star Raiders, Atari 800 version, amazed by the game being full 3d on such a small size, the clone of the game he made in Unity is eighty times bigger just from the executable.
Uses sprites, but the game has proper 3d location tracking and rotates properly. So amazed by the game he figured out how to extract the assembly code the game was made on and studied it. His research of it probably led to him getting his first job.
2)Ultima III: Exodus. Didn't play it until 1987, didn't play the first two. First RPG love. Loved the party control and puzzles, particularly Moongates. Praises the final encounter. Liked that there was level scaling on the outside but that the dungeons had fixed levels that could be quite high. Spent a whole summer playing it. Cain has played RPGs with better graphics/stories/characters/mechanics, but Ultima III lit the cRPG spark.
3) Star Control II. Played the first star control, but mainly just messing with the two player combat mode with a friend. Loved the nonlinear, open world, excellent narrative and characters. Appreciated the dark storyline despite the funny characters, major influence for Fallout. Loved the combat. Still hums the music from time to time. Considers Star Control II an RPG, if you consider your character the ship, everything about it makes it a CRPG. Reference to writing about it in felipepepe's book.
4) Star Wars X Wing. Played Wing Commander, but loved (original trilogy) star wars and preferred this game. Bought a joystick just to play it. Loved the game being true 3d compared to Wing Commander and Star Trek 25th Anniversary's sprites. Liked power control. Played it to the point he wore out his joystick, won another joystick at a Logitech booth at the first GDC, but can't remember what for.
5) Everquest. Got addicted to it. Appreciated differences between singleplayer and multiplayer games in terms of difficulty and storytelling. Goes over the spice girls/necromancer/all hobbit groups he built that he previously mentioned. Directly led to him wanting to make an MMO which lead to him working at Carbine.