If you want to buy the 3 games from the developers then it's best to get a Patreon subscription above for 20 USD. This gives you a extra version for the games and get all three games with extra for only 20 USD once instead of buying them here for 24 USD for the 3 games. But remember to cancel the subscription if you just want the games after you donwlodet it and synchronized the extra scens but if you want to support them after you played the games you can chang your subscription to lower ore higher monny it is your choice
PS: The games are awsome and the extra scens are okay too