It's been 22 years, and Leah the game is 12 years old。
He's been having a hard time and has been in poor health.
Viscaria/Atera is the creator of the original Insect Prison game, which was a mod of a game called Cardwirth.
He didn't make Ojou-sama Gakuen Cosplay Harem-bu! "Kyou wa Dono Fuku de Ecchi Shiyokka?", but he helped illustrate it.
Hope this helps. :)