Skeleton Krew for the Sega Genesis.

Lyric Sonata
http://davidkanaga.com/sonataforms/
Part of the Humble Monthly April bundle.

Deus Ex: Mankind Divided - System Rift DLC
http://deusex.wikia.com/wiki/System_Rift

Deus Ex: Mankind Divided - A Criminal Past DLC
http://deusex.wikia.com/wiki/A_Criminal_Past

(extra mission, originally a preorder/CE bonus, later allowed to be downloaded for free)
Deus Ex: Mankind Divided - Desperate Measures DLC
http://deusex.wikia.com/wiki/Desperate_Measures
(best I can do for a representation image is the CE bonus list, which has a section that can be cut out)
http://collectorsedition.org/uploads/2015/10/91aOw6qp4bL.SL1500.jpg

It's getting rare for me to find games that aren't added yet, but here's one.

Neofeud
http://store.steampowered.com/app/673850/Neofeud/

Time Carnage - http://store.steampowered.com/app/554280/Time_Carnage/
The American Dream - http://store.steampowered.com/app/456180/The_American_Dream/

@everyone - I think I've added everything that's been requested, let me know if I missed anything!

escargot kart and pitfall planet

@pasbow - Those have been added!

Let's Sing 2018

https://www.nintendo.ch/de/Spiele/Nintendo-Switch/Let-s-Sing-2018-mit-deutschen-Hits-1308160.html

Assassin's Creed: Brotherhood DLC - The Da Vinci Disappearance

https://store.playstation.com/en-us/product/UP0001-BLUS30537_00-AC2DLC4000000001

Defenders of Oasis for the Sega Game Gear.

card city nights has a sequel

steeam app 255390
also this one

indiedb.com/games/flying-red-barrel

thanks

@everyone - Those have all been added!

Oasis Games VR Fun Pack ( https://www.play-asia.com/13/70bspn ) - a compilation consisting of:
- Weeping Doll (not in db)
- Dying: Reborn ( http://www.completionator.com/Game/Details/39044 )
- Pixel Gear ( http://www.completionator.com/Game/Details/37929 )
- Light Tracer (not in db)

u gotta add

max and cursed brotherhoood

the Tenth Line

"BoxBoxBoy!" and "Bye-Bye BoxBoy!" for Nintendo 3DS

Thanks for this fantastic website!

@kw4s and @Zaphod - Those have been added!

@pasbow - I added The Tenth Line and you can find Max: The Curse of Brotherhood here: http://www.completionator.com/Game/Details/3185

Here's a few games I recently picked up, that are not on the site

Little Nicky: https://gamefaqs.gamespot.com/gbc/375077-little-nicky
Kwirk: https://gamefaqs.gamespot.com/gameboy/585783-kwirk
Castlevania: The Adventure ReBirth: https://gamefaqs.gamespot.com/wii/973241-castlevania-the-adventure-rebirth
Mario Bros II: https://en.wikipedia.org/wiki/Mario_Bros._II

Castlevania: Rondo of Blood: https://en.wikipedia.org/wiki/Castlevania:_Rondo_of_Blood
R-Type Complete CD: http://www.pcengine.co.uk/HTML_Games/R-Type_Complete_CD.htm
Maniac Pro Wrestlinbg: http://www.pcengine.co.uk/HTML_Games/Maniac_Pro_Wrestling.htm
Donkey Kong Country Competition Cartridge: https://www.mariowiki.com/Donkey_Kong_Country_Competition_Cartridge

@Cryogentics - The requested games have been added!

Also, Kwirk has been added in the past, here's the link - http://www.completionator.com/Game/Details/26626

@NLouns thank you for some reason it was showing up for me during a bulk import of new Game Boy Games I picked up last week