Cave Story
I first ported the famous indie classic to the GP2X, a homebrew console platform. Approximately one year after the release I was approached by Nicalis to port the game to Nintendo DSi, which was my first commercial console port and took about half a year.
I was also involved in the development of Cave Story 3D, in charge of porting Cave Story+, an improved PC version, to Linux, and I helped out with the Nintendo Switch port by adding 2-player co-op as a new feature.