Spyro. Hard stop. Beat over 100% several times. Loved the platform mechanics, the visuals, the humor, and the sense of wonder. Lovely games that basically scratches that itch of a mobile collecting game but with a story to follow and purpose for doing it.
The Halo franchise is also up there but i actually was just one of the people that just built maps in forge for custom game modes and think that was super fun, limits that made me more creative with how i built the maps. Then to see them get played and filled with people was always so fun.