All sweet memories...
Chips Challenge is outstanding in Microsoft Entertain Pack at the time it is released. I spent many nights at the computer playing it until tired.
Right now I play DROD (Deadly Rooms of Death), which has similar concept like Chips Challenge and has lots more puzzles to solve. The difference is instead of getting all the chips you have to kill all monsters in a room, then finish all rooms (usually 10-15 rooms) to go to the next level. I must say sometimes this game is driving me crazy because it is insanely HARD. There are 25 levels in the originals and lots of fanmade levels free to download.
If you want to try it, visit
www.drod.net. It is rated the top puzzle game now at Underdogs.