Ultimate Sudoku Collection contains several variations of Sudoku game.
Sudoku basic rule: Fill numbers in the board such that every row, column and region contains one occurrence of each number.
Features:
- Beginner, Easy, Moderate, Hard and Expert difficulties for every game type
- Tons of puzzles guarenteed to have only one solution
- Easy note taking
- Autosave the process of unfinished levels
- Record best completion time for each level
- Hint feature
- Achievements
Current Game Types:
- Basic
- Gattai-3
- Gattai-3 Diagonal
- Gattai-3 Anti-Diagonal
- Butterfly
- Sohei
- Flower
- Samurai
- Samurai Jigsaw
- Samurai Diagonal
- Samurai Anti-Diagonal
- Cross

Minimum:
OS:
Windows Vista SP1+
Processor:
2.0Ghz+
Memory:
1 GB RAM
Graphics:
Graphics card with DX10 (shader model 4.0) capabilities.
Storage:
200 MB available space