Games tested on a Windows 10 virtual machine that never had Steam installed:
Adorable Crush (app/1266800): Runs right off the bat, no special setting up needed.
Castle of Lust - Hentai Fantasy Game (app/1243270): Use the steam_appid.txt method.
Dream Girls Collection (app/1722770): Runs right off the bat, no special setting up needed.
Something to note: The +18 DLC replaces most arts with very different ones, so keep two back ups of the game, one with and one without the DLC.
Escape from the Princess (app/857080): Linux build tested. Includes Windows executable. Neither Linux or Windows executables require special setting up.
Failed Adventurer (app/1349850): Use the steam_appid.txt method.
Happy Numbers (app/1420830): Runs right off the bat, no special setting up needed.
Hentai Hack-Her (app/1596980): Use the steam_appid.txt method.
King of Halloween (app/1148260): Runs right off the bat, no special setting up needed. Launch the game from nw.exe.
Neko Beach (app/1630650): Runs right off the bat, no special setting up needed.
NYANCO MINE (app/1435160): Runs right off the bat, no special setting up needed.
Путешествие паладина (app/1250280; "Paladin Quest" according to the game banner): Runs right off the bat, no special setting up needed.
Selenophobia (app/700470): Runs right off the bat, no special setting up needed.
Something to note: Each the Chinese builds have different contents from the English build, so keep a backup of all 3 builds.
Succubus Rem (app/726990): Runs right off the bat, no special setting up needed. Run either /Succubus Rem/www/index.html or /Succubus Rem/Game.exe. Also, you need to download the game once for each language you want to back up, since each language uses a different build.
Witch Zoe - Hentai Shuffle (app/1261500): Use the steam_appid.txt method.
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Game tested in an Ubuntu 20.04 virtual machine that never had Steam installed:
Horny Sekai (app/1624380): Runs right off the bat, no special setting up needed.
Post edited September 06, 2021 by _Auster_