Post #1 in this thread is the tracking of what has been on sale. Madth3's list is what may later show up in a flash sale, a full list of which was uncovered at the beginning of the sale by JMich.

Ok gotcha, Thanks!

Rumoured.

Well, that's good cause I just found out I missed IL2 and Don't Starve... I'll also be watching out for that Red Baron if it posts, have never seen that one on sale, loved that thing when it came out.

Course I'm really burnt out from a rough day, but I'll stay with it for a while I guess.

Probably not the way people would have hoped, but the promotions do stack ;)

Hear Hear. Pre-digital distribution era my sweet spot used to be $30, and $60 for new games, but I buy a lot less games, only knowing games from the newspaper / magazine and word of mouth / physical retailer poster.

Digital distribution is a blessing and a curse, as the publisher / developers abuse them to bring unfinished, buggy games for a money grab and patch them / add content afterwards. Then the practice got more popular and more dev / publisher does not even bother patched up their bugs. Then come first day DLC, cut content DLC, minimal content DLC instead of a proper sequel with content to justify their price!

This make my sweet spot drop to $30 for new games, preferring longer and longer for the bugs to be fix and DLC to be bundled up as complete / epic / gold / diamond / director cut / asdfghj edition. I still pay full price to dev I trust like the old blizzard, stardock and such but not anymore for a game dev I don't know / extensively research on.

Then comes steam sales and humble and I think since I have to wait a year for the complete edition and reviews to justify games purchase, the game get heavily discounted by then and my sweet spot drop further to $15, $10. The dev I trust like blizzard remain largely unaffected with my purchasing habits.

Then there is this always online requirement that many publish adopt. HoMM series, C&C series, Dispite I am paying full price for games like diablo 3 and starcraft 2, It force me out of my single player game when my online connection hiccup. Then there is this Magic The Gathering Tactics supported by Sony & Wizardry of the cost pull out the game by closing down the server, the $100 I invested in it goes poof.
I raged and will not buy any online game anymore, and my sweet spot drip to the abyss.

Then steam has this DRM that force you to be online after a period of time or lock out your games makes me tick dev like stardock that goes steam only off my list. The final straw comes when I could not download any of steam games due to steam not liking my internet provider security protocol while other platform like impulse (gamestop) have no problem with that. Despite the many e-mail to steam support I only receive stereotype answer. That drove me to alternative like GOG, Humble, GamersGate and after trying them out I am a happy camper on GOG and bought GOG own games like Witcher series without waiting for discount.

I turn my support to kickstarters and responsible dev who get me buying their games without waiting for discount.

Next is:
Riddick
Dragon Lore
Tropico 3
Book of Unwritten Tales
I have no Mouth
Ethan Metor Hunter

Recap

There has been 181 distinct games on flash sales (Plus other four announced) as chronicled in the first post of the thread by IAmSinistar or in the list by Pidgeot bot.

JMisch discovered a set of images which have been used in the flash sales.
The following games have a corresponding image but have not appeared in the sale. It has not been confirmed wether this games will appear.

11th Hour, The
1954 Alcatraz
Alan Wake's American Nightmare
Amnesia: The Dark Descent
Banished
Bard's Tale
Blazblue Calamity Trigger
Blitzkrieg Anthology
Capitalism Plus
Ceville
Cognition: An Erica Reed Thriller
Defender's Quest
DeusEx GOTY Edition
Divinity II: Developers Cut
Drod 1+2+3
Edna & Harvey: Harvey's New Eyes
Fractured Soul
Full Spectrum Warrior: Ten Hammers
Incredipede
Jack Keane
Jazzpunk
Lucius
Master of Orion 1+2
Megabyte Punch
Moebius Empire Rising
Oddworld: Abe's Oddysee
Omerta City of Gangsters
Omerta City of Gangsters Gold Edition
Omerta City of Gangsters: The Japanese Incentive
Outlast Whistleblower
Pixel Junk Monsters
Racedriver Grid
Red Baron Pack
Red Faction
Rogue Legacy
Shattered Haven
Sid Meier's Alpha Centauri
Space Colony HD
Stacking
Still Life 2
Stronghold HD
Super Puzzle Platformer Deluxe
System Shock 2
Tales From Space: Mutant Blobs Attack
Torchlight
Wargame European Escalation
The Whispered World
Worms United

Edit: Updated

The remaining images very well could represent upcoming freebie giveaways that haven't yet occurred.

There haven't been a single freebie I'm aware of.

There has been no giveaways or freebies at all....yet

I'd bet at least some of them are flash sales. The obvious choices would be where the second installment in a series has already been up, like Deus Ex, MoO, and Blitzkrieg. That's not to say all of them will be flash sales...

Ugh theres a few more repeats...

Indeed.There are at least 15 missing games to fulfill the promissed 200 flash sales.\ but the rest could be what you say. Maybe Jack Keane. :)