Stackwords

Consists of an 8x8 upright grid into which letter tiles may be dropped at the top of each column. Each column fills from the bottom up. The two players each face a different side of the grid, so what is a legal left-to-right word for one isn't for the other. Only the vertical (top-to-bottom) words are in common. The players score by making words vertically, horizontally or diagonally. - BoardGameGeek