Turrican 2 is my alltime favorite Run'n'Gun.
I played it up and down on the Amiga and still play it today.
There's actually a great MS-DOS port done by Sun-Project, which runs fine in DOSBox, if you replace the configuration file on every start with a default one.
The graphics are improved to 256 VGA colors, I am not a big fan of the altered character design however.
Two years ago I was able to snag the game + original box, after owning it as part of a collection a long time ago.
On itch.io you can find a version that ported the VGA version to Amiga AGA. The programmer also added (optional, deactivable in the main menu for the "original" feeling) enhancements, better multi button gamepad support, the ability to look down, you can pick your character design and there are some new secret areas in the levels. If you find all, you unlock a special ending. This is the best version to play in my eyes, runs on PC in FS-UAE without problems.