Many of these games are online only (MMO Sex Game) so an internet connection may be required to play.
However, abandonware sex games are the earliest iterations of virtual sex games.
Abandonware is pretty much any software (or hardware) that is ignored by most, if not all, major parties involved which includes but is not limited to the owner/creator, product support members and possibly copyright enforcement entities.
It will only use your Internet connection for downloading Girlvania content to you so although an Internet connection is needed to initially download the game, Girlvania can be played completely offline.
Click the image below to access the free demo (18 only).
Collectables are a big thing in Thri XXX's virtual sex world.