Summer Sale MMXVII Price Glitches/Errors/Lowest Ever Best Prices [UPDATED]

Every sale, I try to start up this price glitch/errors/best ever price thread. This time won't be any different.

Feel free to list any notable errors or really amazing prices that you find, and I'll keep the thread updated. This list does NOT include negative prices, as those are always made non-purchasable in your cart. We want glitches, mistakes, or best ever prices--look for weird percentages and use Extended Steam to help you see the price history of a game! Thanks for helping!

Here is a link to the Steam page with ALL games sorted by price: List of all Steam games and current prices!

| Transistor | 85%|
| Left 4 Dead 2 | 90%|
| Kalimba | 75%|
| Van Helsing Series | 80%|
| Dreadout | 90%|
| Portal Bundle | 93%|
| Valve Complete Pack | ~91%|
| Fairy Fencer F Advent Dark Force | 80%|
| Hyperdimension Noire | %|
| Stardew Valley | 40%|
| Dead Rising 3 | 70%|
| Deus Ex: Mankind Divided | 75%|
| Steins;gate | 40%|
| Light and Dark Bundle with Valley and Slender: The Arrival | 83%|
| Daedalic Artist Selection Bundl | 88%|
| Azure Striker GunVolt | 75%|
| Actual Sunlight | 90%|
| Bombshell | 90%|
| Dustbowl | 75%|
| Metal Gear Solid: Ground Zeroes | 80%|
| Fuego | 90%|
| Pandemonium! | 80%|
| Corpse of Discovery | 85%|
| How to Survive: Third Person Standalone | 90%|
| Fallout Classic Collection | 75%|
| Mystery Chronicle: One Way Heroics | 90%|
| Divinity: Dragon Commander | 90%|
| SOMA | 70%|
| Beeswing | 90%|
| I Am the Hero | 70%|
| Near Death | 67%|
| Streets of Fury EX | 80%|
| Virginia | 75%|
| Wuppo | 60%|
| Tadpole Treble | 75%|
| Hard West: Scars of Freedom DLC | 75%|
| Death by Game Show | 90%|
| Superbrothers: Sword & Sworcery EP | 80%|
| Massive Chalice | 90%|
| 1979 Revolution: Black Friday | 60%|
| Until I Have You | 80%|
| Lara Croft GO | 66%|
| Monkey Island: Special Edition Bundle | 75%|
| Serious Sam 3: BFE Gold Edition | 92%|
| Project Highrise | 65%|
| Baldur's Gate: Siege of Dragonspear DLC | 50%|
| Quantum Break | 50%|
| Rise of the Tomb Raider (20 Year Celebration + Season Pass) | 60%|
| Quake Collection | 75%|
| Retro Army Complete Collection | 90%|
| Baldur's Gate Infinity Collection | 75%|
| Best of Klei | 69%|
| Introversion Complete Bundle | 90%|
| Daedalic Summer Sale Bundle 2017 | 59%|
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Madjoki's automated price glitch hunter (very beta still):
Steam Chat: http://steamcommunity.com/groups/stop1/
Discord: https://discord.gg/aCkPCu (#pricefeed) even more beta