For those who don't yet know, Ark II will be on Gamepass on Day 1

ARK 2 will remain on Xbox Game Pass for at least 3 yrs upon its release. Ark 1 will stay in the service forever. : r/ARK

Xbox Game Pass Members Can Now Pre-Install 'Coming Soon' Games

Everything announced at the Xbox Bethesda Games Showcase

Will ARK: Survival Ascended Be On Game Pass? Answered

Coming Soon to Xbox Game Pass for Android, Console, and PC: Celeste, Grim Fandango, PUBG and More - Xbox Wire

Xbox Partner Preview: A New Dinosaur Survival Adventure Begins Soon with Ark: Survival Ascended - Xbox Wire

Ark 2 has been delayed, Ark 1 is getting a $40 upgrade that will kill last-gen servers

Based on when they were added, these MIGHT leave gamepass in January. For those who want more than 2 weeks notice : r/xboxone

ARK 2 GamePass to last 3 years and legal battles continue