No revenue estimate for PSN — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $3.2K — a different platform, not this one.

Chess Knights: Viking Lands

Help the Knights to rescue their Kings and Queens in the beautiful and dangerous Vikings Lands. An innovative game concept inspired by chess. This is an original puzzle game inspired by chess. Using chess Knights, you need to move through the board until you reach the squares where your other pieces are held prisoner. Then, comeback to the safe zone without being captured by enemy pieces to rescue all your pieces! Featuring: All pieces move like in a chess game, but the objective is to use your Knights to rescue your other pieces that are held prisoner in certain squares of the board; 40 hand-crafted levels with increasing complexity. A chess game without any chess. This is an entirely new game concept for chess lovers and newcomers alike (you do not need to know any chess to play it); Enjoy the beauties and dangers of the Viking Lands; Originally composed soundtracks;