This really depends on the era of game you are looking for. If you want newer games, i would say Houdini or TWD. You could also go with just about any JJP game for complexity (WOZ and POTC would be at the top of the list, however). The Shadow or BSD for 90s. Older games would be Flash Gordon or paragon. There are a lot of EM games that could work as well, but only if you are considering high score as the metric (since they obviously arent as complex as newer pins).