Consider your interests and the type of experience you're looking for.
Consider trying a new game once you're done with your PC. Suggestions include something light and fun to unwind.
Witcher 3: Legend of Grimrock 2 is an expansion featuring new content and challenges.
Head to Global on CSGO, then once finished and prepared for a tough end, switch to a more fun experience like GTA or a calming story mode game.
Witcher 3... I don't have any other games that match that quality, do I?
Fallout 4 Witcher 3 bioshock CS:GO feedback – also includes Mad Max Metro Redux, Borderlands series, Shadow of Mordor.
Runescape.
Fallout 4, Witcher 3, Bioshock Infinite – a blend of post-apocalyptic worlds and dark storytelling.
Legends of the League.
Military operations with protection gear!
I concur with the comments on this Witcher 3 discussion.