Wait what other collections? I've never been able to find any other games by Atela, do u have a link to his page or the games released by him?
Sorry for the misunderstanding, I don’t think he has other games, with collections I mean literal CG collections. You can find them easily in some CG sites (like on rule 34) if you search for the author name. I can’t freely share links for those sites given my position, but you can also check his contents on his official Ci-en page.