My recommendations from the sale:
Superhot VR - my favorite VR game to date. Short game but post-campaign challenge modes are amazing
Keep Talking and Nobody Explodes - two players, one reads manual, the other defuses a bomb
Thumper - Trippy rhythm game where your ship speeds along a track.
Job Simulator - One of the best VR showcases
Vanishing Realms - RPG with really good melee combat
Sairento VR - Bad-ass ninja-ry
Tilt Brush - the best 3D painting app on Vive
Raw Data - Lots of action, great visuals
Pavlov VR - essentially Counterstrike in VR, supports user-created maps
Tethered - good VR RTS
A Chair in a Room : Greenwater - roomscale psychological horror game, with great music, voice acting and story.
House of the Dying Sun - space sim with good reviews.
Brookhaven Experiment - horror wave shooter
Serious Sam VR: The First Encounter - great VR port with sliding locomotion. haven't played.
Serious Sam VR: The Second Encounter - the sequel. if you get one, get First Encounter, consensus says
The Gallery - Episode 1: Call of the Starseed - Just picked this one up in the sale. Just wanted to support the devs for sharing Knuckles info, and it also just looks like a solid VR experience
Dead Secret - Horror/Mystery. Just picked up in the sale.
Smashbox Arena - MP shooter with an arcadey feel.
Mind OVR Matter - action/arcade game that gives you telekinetic powers
Battlezone - tank combat
TO THE TOP - climbing/platforming with a new spin on grab mechanics.
Audioshield - Rhythm game with auto-generated beatmaps. Not as tight as manual maps, but you can play any song you can find on Youtube.
VR The Diner Duo - Asymmetric MP game (other player uses gamepad on monitor)
Project Cars - Great racing sim, best in VR.
Assetto Corsa - Another great sim,
here's a comparison between the two (also read replies for balanced views)
Werewolves Within - multiplayer whodunnit where your words and body language can change the outcome
Lunar Flight - a Lunar Lander-like sim that deserves more attention. Gamepad-based. Oldest VR-supported game on Steam?
Fantastic Contraption - Roomscale physics puzzles where you build a contraption to get to the goal
OVRdrop (great app for bringing desktop windows into VR games)
Windlands - Spiderman-like platformer, very soothing.