Changes

MGS 1: Option to inject the dev menu (stage select) at game startup. This replaces the title screen but it can still be accessed by selecting 'title' from the dev menu.
MGS 1: Options to revert changes made in the Master Collection via patches to the exorcism pictures and Johnny's underpants. (Be warned, there is no mosaic blur at this time!)
Other minor fixes / fix attempts / adjustments. Built with different compiler flags in the hope that it will trick Windows Defender for those affected, let me know how it goes.

Analog (MGS 1)

Recommended Steam controller profile: steam://controllerconfig/2131630/3087945618 (copy to browser address bar).

Make sure to download the correct zip for the game. A separate fix is required for Bonus Content as it's 64 bit, while MGS1 is 32 bit.
Extract the contents of the release zip in to the the game folder.
(e.g. "steamapps\common\MGS1" or "steamapps\common\MGS Master Collection Bonus Content" for Steam).

Open up the Steam properties of MGS1 and put WINEDLLOVERRIDES="d3d11=n,b" %command% in the launch options.