MofC: Ah..... thats annoying.....
Arkose: If you're looking to pick up a usable MechWarrior 2 version on eBay or whatever, here's a handy reference.
Works: DOS, Windows 95, Pentium, Diamond Monster 3D, 3Dfx, Battlepack, Titanium.
Won't work: ATI Rage, Matrox Mystique, PowerVR, S3 ViRGE, STB Velocity.
MechWarrior 2: 31st Century Combat exists in all these versions (and probably a couple I missed). Ghost Bear's Legacy only exists in Titanium and basic DOS/Windows 95 versions. Mercenaries has a limited selection of the above.
The 3D-accelerated versions always specify the accelerator on the box front as well as the disc itself so even if the listing is disc-only you can still know which version it is. The basic software-rendered DOS and Windows 95 versions don't specify an accelerator so you can easily recognise them by its absence.
For the versions that work you'll need
MechVM, and some versions also need an additional manual fix (copying dplay.dll over from the disc). For the versions that include a 3dfx renderer (Diamond Monster 3D, 3Dfx, Titanium) you can use
nGlide or the like to enhance its graphics.
I tried this but the Titanium version does not work with Windows 8.1. Only Windows 7.