I tend to play text-based games, but I have a few besides those already mentioned:
Lilith’s Lair is ace all around, though it’s spread across a variety of fetishes, not just WG
Lachevite’s games, the most recent of which is Avril’s Appetite. Expressions are particularly great
Cards of Gluttony - a gay, weight gain card game [v0.7.0 released on 26/01/2026!] has a lot of care put into its bear art and a lot of customization for the player character
Likewise, The Curse of Something: A RPG Game About Large Furry Men, focuses on musclechub and straight up muscle figures, balancing hot and deliberately funny
Chubway has some lovely character art at a variety of weight stages