Pseudo-ku

Pseudo-ku is a take on today's most popular pencil and paper puzzle game Su Doku. This computerized version uses colored gemstones instead of boring numbers and even offers an easy mode for practice to those who need to learn how to play the game. The free demo contains 4 easy practice puzzles and 1 normal puzzle. The full version, which can be purchased from within the demo for just $5.99, comes with 320 puzzles to advance through.

Requirements:

Windows 2000/XP

Limitations:

Limitted number of puzzles