u/onlyhahe

BIG visual novel about weight gaining with plenty related micro fetishes. Today add it to my list to play

Really small game filled with a lot of endings and a lot of ways to fatten. You can make your character 500lbs/250kg and more. The ending depends on your character weight (8 naughty endings)
Me, personally, open only 3 so that is the nice challenge too

https://ohnoanotherbutton.itch.io/2-days-to-fat

Small game with different ways to customize your roommate, including breast expansion, bimbofication, giantess and etc

Also there are nice mini games

https://tightly.itch.io/modification-app

The author regularly adds new content, so I hope soon there will be weight gain

Sultans harem is a mid-long visual novel with a lot of girls, putting on significant weight and lewd stuffing scenes

Highly recommend

https://livegoeson.itch.io/the-sultans-harem