Currently Online 
My top Xbox One/Xbox Series playtimes as of now:
(limited to games over 50 hours to cut down on list size)
304 hours: Overwatch 2
209 hours: Halo Infinite
189 hours: Dead By Daylight
171 hours: Plants vs Zombies: Battle for Neighborville
165 hours: Halo: Master Chief Collection
143 hours: Assassin's Creed Valhalla
112 hours: Dragon Age Inquisition
98 hours: Star Trek Online
95 hours: Witcher 3 (some of my playtime is missing here I believe, must have played it offline some)
95 hours: Final Fantasy XV
81 hours: Plants vs Zombies: Garden Warfare
80 hours: Terraria
73 hours: Cyberpunk 2077
67 hours: Titanfall
66 hours: Sword Art Online: Fatal Bullet
65 hours: Assassin's Creed Unity
61 hours: Borderlands 3
59 hours: Far Cry 6
59 hours: Peggle 2
56 hours: Fallout 4 (believe I am missing some playtime here much like Witcher 3 above)
55 hours: Microsoft Flight Simulator
51 hours: Mad Max
50 hours: Assassin's Creed 4: Black Flag
