Doki Doki Literature Club - You pay with tears and trauma.

Then Rick bursts in a gives you a copy of Katawa Shoujo.

Or better, fixes the game so you can get a harem ending with sex included, only for 15.99$.
And for 5$ more he can make any of the girls from the game real and in love with you (He is not responsible if she becomes crazy and tries to cut off your dick)