To avoid cluttering this with too much information, I will only list Illusiat 13 builds that were released to public below, from newest to oldest, including unfinished versions.

0.90c - 03/24/10
-Game name changed to Illusiat 13: The Final Chapter, instead of Illusiat 13: The Last Chapter

0.90b - 12/19/09
-Added progress percentage during loading/saving
-Slightly improved walking speed
-Fixed code typo causing a warp to the wrong map in 4th Dimension.
-Fixed error allowing you to open the Sanctuary with only two of the four keys.
-Fixed two error with shop guy (and door) event in abandonned mine.
-Fixed display glitch during rock grabbing event.
-Fixed healer guy in Deltamorphanium not healing you at all when he says he will do so.

0.90 - 09/16/09
-Initial release of unfinished game (stopped on 07/07/09), missing final dungeon and a side quest.