Gravity Chess (2013)

A gravity game where the pieces move according to chess rules. Each player has one king (weight 6), three queens (weight 4), four rooks (weight 3), four bishops (weight 2), and four pawns (weight 1).
You win by a) taking so many opponent pieces that the board cannot be placed level, c) placing your king on the center line without your opponent being able to take it, or c) taking your opponent's king.

—user summary