Not sure if this was already posted, but GreenManGaming have a bundle where you can pick 5 games from a long list for $1.
Lots of it looks like junk, but there are a couple of interesting looking games in there.
Chainsaw warrior LoN, Aporia: Beyond the Valley, Peregrin, Fahrenheit / Indigo Prophecy, Frozen Synapse Prime, Elven Legacy being the main ones I recognize.
The UI is a pain (Have to keep clicking ‘load more’ at the bottom, and keys are apparently limited. No idea on expiry date.
edit: full list in crappy format: sorry:
AIM Racing Steam Recovery Search and Rescue Simulation Frozen Synapse Prime
Aporia Beyond The Valley Rock N Roll Defense Gone In November
Bacteria Russian SuperHero Dead Ivan Goosebumps The Game
Ballistick Skilltree Saga Herding Dog
Big Buck Hunter Arcade Soulcraft Hexoscope
Biozone Stable Orbit Hiiro
Black Sand Drift Street Racing Syndicate Hoven the Sages Spinel
Chainsaw Warrior Lords of the Night Super Bomb Rush Huntsman The Orphanage
Citalis Super Hardcore It came from space and ate our brains
Corporate Lifestyle Simulator Supreme League of Patriots Issue 2 Patriot Frames Machine Made Rebirth
Cranium Conundrum Switch Galaxy Madrobot X
Cross of the Dutchman Tales of Destruction Merger 3D
Cyber City 2157 The Visual Novel Taxi Moribund
Daily Chthonicle Editors Edition The Asskickers Nash Racing
Dear RED Extended The Last Door Steam Nihilumbra Steam
Elven Legacy Steam The Pasture Paranautical Activity Deluxe Atonement Edition
Energy Balance Three Dead Zed Steam Peregrin
Energy Cycle Toybox turbos Post Master
Fahrenheit Indigo Prophecy Remastered Uncanny Valley Pulsecharge
Farming World Urizen Shadows of the Cold Purgatory
Farnham Fables Vindictive Drive Puzzle Chronicles