The game freezes. It'll go for some time, then for no apparent reason, the video will freeze (though the game will still be playing). This seems to be a known issue, and GoG has apparently refused to fix it. So, save every time you do something you don't want to do again. I've been saving every 5 minutes or so. On rare occasions, it will unfreeze, but this has happened about twice out of dozens of lockups. So, great game, classic, otherwise runs well, but be prepared for the issue. Also, I had to download the patched map files, since the ones provided will not allow for spawned goblins, dark knights, and dark angels in several maps. You can search around to find them.
