Pathologic

Collect all the white circles! In this game you are controlling a white dot and you use your arrow keys to move about the grid. Now that seems easy enough, but you will have to use some serious strategy here. You see, you can’t go back over any of the squares you already touched. Your job is to collect all of the circles while not going over the same square twice. It’s a very challenging game even in the tutorial levels, and it only gets more difficult. This is a one player game.