On Bluesky @vgdensetsuさんのイラストまとめ

4 NES games illustrated by Greg Winters:
Klash Ball
Conan
Cabal
Shadow of the Ninja

In fact, Shisui had to do most of the second half of the project by themself.

A 3D render of Gi Gi and its sprite version animated by Shisui, via @ItsFantasticAC . 3/3
https://t.co/Nyn2EZE5ru

Greg Winters has collaborated on many occasions with Sega of America, a branch that has sometimes published games by other developers in the United States.
Alisia Dragoon
Chakan
Galaxy Force II
Lightening Force, AKA Thunder Force IV

Greg Winters and Mega Man, part 3:
Mega Man X 1 and 3.

Greg Winters and Mega Man, part 2:
Mega Man 7
Mega Man V
Mega Man Soccer
Mega Man: The Wily Wars (painted for the American version which was only available on Sega Channel)

But it is especially on the Mega Man series that the collaboration between Greg Winters and Capcom has been prolific. He illustrated a good part of the Mega Man games released on NES, Super NES and Game Boy.
Mega Man 3 to 6:

Greg Winters began his career as a freelance illustrator in 1982. One of his first cover art was for the 1984 adaptation of Gremlins for consoles an computers. He also painted one of the movie posters of Gremlins 2, which was also used for the cover of the Famicom adaptation.

Street Fighter X Onitsuka Tiger collab illustrated by Masakazu Katsura (Video Girl Ai, Zetman; Wingman) in 2019.
https://t.co/uJZ0X7gVwG

A few more Vic Tokai games illustrated by Lawrence Fletcher:
All-Pro Basketball
Scratch golf
Another illustration for the unreleased game Secret Ties
An alternate version of the cover art for Imperium

Lawrence Fletcher also worked on a few unreleased NES games that were meant to be published by Vic Tokai in the US:
Mariner's run
Dweebers
Secret Ties
Shogun Maeda