Pente

This is a two player game, where one tries to get 5 stones in a row or capture 5 pairs of stones. To capture, one places two stones around two other stones, so that the four pieces form a line. See here: http://www.pente.net/instructions.html Currently, however, captures cannot be made diagonally, and neither can 5 in a rows. Everything is orthogonal. Very good graphics, soundtrack, medium download size.