Battlefield 4 / 1 / V - just campaigns. What I remember from playthroughs were nice graphics and cool sound effects.
Sniper Elite V2 Remastered - I have done it in few coop sessions with my brother. The ability to finish the full singleplayer campaign in coop is a great feature in games and this is what I look for nowadays.
Hellblade: Senua Sacrifice - quite repetitive mechanic, but for story lovers is very fun to sink in
Start Wars Battlefront II - similar opinion like for Battlefield series, singleplayer only for me
Superliminal - fun game concept
Layers of Fear 1&2/Blair Witch - I have rushed these games just for the sake of completion of my backlog titles.
The Stanley Parable - comedy gold, frustrating at times, quite short, but highly recommended classic
Aperture Desk Job - fun, interactive controller test game from Valve
Serious Sam: Double D XXL - classic platformer from Serious Same universe with funny gun upgrades mechanic, with no political correctness
And some free short games/prologues:
Outpath: First Journey - relaxing, but kinda simplistic Minecraft wannabe game
Ale & Tale Tavern: First Pints - tavern manager game from first person view in medieval times
The Riftbreaker: Prologue - solid prologue for strategy game with robots and aliens
Helltaker - logic, rogue like game with nice humour
The Looker - play The Witness first to get the reference, because this game is a parody
Neon Beats - fun platformer, rhytm game
Clap Clap - short, horror game
Cats Hidden in Paris - find all cats on drawing type of game
And some free short games/prologues: