Just had a look through this thread and a few titles I think are classics but are not mentioned are: Wonderboy 1&2, Repton 2, Lemmings, Operation Wolf(the first arcade title to use force feedback on the control input, I think), Gauntlet(4 player action in the arcades, Outrun(the game wasn't great but the cabinet moved around as you turned the steering wheel, which was awesome for a 9yr old), and I'm sure there are a few more I could mention but aren't coming to mind at the moment!