Hello there, after many hours I compiled this playlist of free visual novels that are available on steam, the playlist consists of full game playthrough that means you can easily view them entirely! :)
https://www.youtube.com/playlist?list=PL-hO6ds-2J4B5WlaYLt5A0TBljLxibSRu
The fallowing visual novels are available in the playlist:
Kidnapped Girl;
A Summer's End - Hong Kong 1986;
One Thousands Lies;
Fallstreak;
Lynne;
Ambre;
Palinurus;
Dissolving;
Trick and Treat;
Blooming Nightshade;
Cirno's Perfect Summer Vacation;
Kill or Love;
The Witch in the Forest;
Without Romance.