Schizm back in 2003 The first game I bought after finishing BS 1-3, my first AGs. Definitely the one I have my deepest regrets about. I know it's a good game, it got good reviews and a lot of people seem to like it but I just can't solve any of the puzzles in all 4 tries I've never got off the first two location(that would be the islands and the floating thingies) having eventually consulted a walkthrough I soon figured out why. It's all math! And if anything I suck at it's math! So after 4 tries I gave up and it's sitting on my shelf ever since unfinished.