From the Ashes meshes well with the base game, and it might help you discover some overlooked side quests. The village building and management is interesting, but ultimately superficial. The conclusion feels somewhat anticlimactic.
The Amorous Adventures of Bold Sir Hans Capon is a bundle of glorified side quests that you might enjoy if you already enjoyed the base game quests featuring Hans Capon and the Charlatan of Sasau.
Band of Bastards is essentially a short side quest consisting of five combat-driven missions and an extremely unsatisfying conclusion.
Months after the final release, Gwent: The Witcher Card Game is still going strong. The minigame-turned-esport continually goes through iterations and patches, shedding skins and morphing into a real beast of a card game. It has a wistful past, a solid present, and a bright future.
Draugen is a short exploration game with not a whole lot to explore, but its majestic Norwegian vistas and its amusing companion engagement make it worth the trip.
Outer Wilds is a triumphant first-person exploration adventure with innovative (quantum) physics puzzles. More than that, it's a microcosm in itself that pleads to be explored and untangled in its minutiae.
If you've already played Heavy Rain on PS3, you won't miss anything. If you're totally new to it as a PC gamer, it might surprise you with its branching narrative and raw drama, even if the writing occasionally misses the mark.
Nowhere Prophet is a unique and thoughtful single-player deckbuilding card game set in a fascinating Indofuturistic world. It features compelling convoy management with hints of The Oregon Trail, and a highly innovative 'living card' mechanic.
Beyond: Two Souls is an interactive drama action-adventure with painfully inept writing. Ellen Page's top-notch acting can only carry it so far until it falls apart in a terminally inane climax.
A Woman's Lot is a rewarding coda for Kingdom Come: Deliverance that might make you itch for a new playthrough. It features two tense questlines where you'll survive the Sack of Skalitz as Henry's love interest Theresa, and help the devout nurse Johanka in her complex theological conundrum.