Here you will find the official links to buy the games of the mgq saga both original trilogy and paradox plus some other monster girl related games and the ones featured in the collab.
Part 1 EN DLsite:
Part 2 EN DLsite:
Part 3 EN DLsite:
Part 1 JP DLsite:
Part 2 JP DLsite:
Part 3 JP DLsite:
Part 1 EN DLsite: http://www.dlsite.com/ecchi-eng/work/=/product_id/RE150726.html
Part 2 EN DLsite: http://www.dlsite.com/ecchi-eng/work/=/product_id/RE201109.html
Part 1 JP DLsite: http://www.dlsite.com/maniax/work/=/product_id/RJ150726.html
Part 2 JP DLsite: http://www.dlsite.com/maniax/work/=/product_id/RJ201109.html
featured in the Collab:
The Three Charms
Succubus Prison ~House of Lewd Demons~
Please don’t post in the comments links to download pirate copies of any of the games of the list, if I see one of those, I will delete those comments without warning.