Oh hey, it's time for Famicase, an annual exhibition held at Japanese indie games store Meteor which invites artists from around the world to design Famicom cartridges for titles that do not actually exist, but maybe should.
You can see a range of highlights below. Note that the last one, a homage to Sega's pissing games, is from Kotaku reader Vittorio Giorgi!
Rōshigumi, byTyler Dori
最後の仕上げだ！ アノテコノテ by 田中千尋
GEO™ by Emily Haasch
Switcharoo by Juan A. Silva Jr.
ROCK/PAPER/SCISSORS by Dan Clarke
オネダンイジョウ by ヨシカワタダシ
Chop 'n Click by Mateusz Czech
Children.™II by Cory Schmitz
ParaSports by Dufond Adrien
A KING'S DOG by WALTER PARENTON
ドナル●トランプ by アートレス
HANGOVER by IDeeez
惑星直列 / Syzygy by Fanny Luor
If Winter Ends by Jeff Wiggins
Super Sneaker Maker by Skyler Holt
『削除されました』by ナツミ /
Kaze Simulator by Vittorio Giorgi
You can see the full range of entries at the Famicase 2017 site.