Yes, the Ratking will also be part of the Ludum Dare #20, at least if His other plans will be successful and He will have the time for it.

He then will use Unity3D Pro, because He created His Mini Ludum Dare #23 entry with it and was very pleased with the result. Other tools are not decided yet, but there will probably be no sound. It will be a game for deaf people! Ahem.

Good luck to you all!

Edit: Other than Unity3D I will probably use iTween, Photoshop Elements 9, 3dsmax 2012 (Trial Version).