Steam Games - Free to play

Some free to play Visual Novels have been released on Steam:

CUPID:

"Love is both poison and cure, both knife and remedy." Set in 18th Century France, this is a gothic romance tale about loss, revenge and the different faces of love.

The Bottom of the Well:

A visual novel where Alice steps into a different kind of wonderland.

In The Bottom of the Well, you play as Alice who has just had an unsettingly life-like dream about the end of the world. She retells her experience to her friend in a huge, branching narrative. Although a single play-through might take as little as 20 minutes, experiencing all the possible paths Alice can take through the ruins of her city will take you many hours.