Futoshiki

If you like Sudoku, then you'll love Futoshiki. Futoshiki is another popular Japanese numeric puzzle game.
Your aim is to put numbers from one to five in each row and column, so they do not repeat themselves. Numbers must also respect the relational signs placed between some cells.
The game includes a generator offering the player three difficulty levels, from easy through medium to hard. For each generated puzzle only one unique solution is guaranteed.