Have yet to try out the others, but I've really enjoyed Xoo: Xeno Xafari.
I have however, been unable to find two of the creatures, despite having been at it for 50 in-game days:
-Dworse
-Homo Impersonatus
Am I just unlucky, or am I missing something. The only other ideas I had to try to find them were:
-Accumulating X number of eggs
-Accumulating X amount of money
-Maybe one of the outfits that says it does nothing?...
-Can I only find these with the two other characters that you can pick?
Otherwise, I'm a bit stumped.
Regardless, I thought Xoo: Xeno Xafari was a good time! I always love the Willy Electrix creatures and their fantastic descriptive text blurbs. Wonderous! :)
(I'll have to make the time for the other/stanalone Xoo: Xeno Xafari one of these days as well, as it seems that is a different game than this one.)