Comprehensive index of games with significant size content (Giantess, Shrinking, Vore), created and maintained by @artsketter (@𝕏)
(A “size” game contains content relating to unnatural size disparities between characters, typically with elements of domination)

Only official links provided for non-freeware games.
(While nobody can stop you from acquiring these games through alternative means, please consider supporting active developers that make content you enjoy)