Puzzle (1249 programs)

Pros: Simple controls and interface. Challenging and compelling central mechanic. Extensive replay value. Develops math skills.

Cons: Frustrating difficulty level. Bare-bones visual presentation. Engrossing gameplay can consume hours. No strategy guide or hints.

Pros: Original concept. Teaches you a bit of DOS and UNIX. Absorbing.

Cons: Some bad language. Puzzles can be very hard. Hard to resume later if you don't take notes.