Cyadonia is a new sliding block puzzle game in the vein of Blockoban or Orbox B. Its author, Newcolator, has packed the game with every idea for a tile-based puzzler you can think of, including pushable blocks, lasers, mines, key-and-lock combinations, and so very, very much more. Basically, it's just a mammoth game with an incredible amount of variety. It could be tighter, but it couldn't be much more ambitious.