This is one of my favourite Metal Slug and NeoGeo games. It comes included with an emulator and the ROM files, as known by MAME and FinalBurnAlpha. This makes it possible to run the game with RetroArch or other emulators and ultimately grants it one or two stars more. The emulator for the Linux version at least, has problems with high display framerates. As I'm using a 144Hz monitor, the game runs at more than double the speed and there is no VSync or framerate option. You can't rebind the controls for keyboard or controller. However, you have the option to control more game settings than in the Steam version of the game. Unfortunately, there is no level select any more. Also there are unskippable splash screens. (Why?!) The game is super fun, although you will die at some times and there is no way this game is made to be played without deaths, which in my opinion can be kind of frustrating at times. If these issues were addressed, this could have been a truly great experience. I'm hoping to see WindJammers (1) on GoG some day.
