I am guessing you downloaded the MekTek pack and see a folder named 'base' and a UDT file after extracting? look inside the 'base' folder that is like how it would have installed into a location back in the day.
There will be an .exe named 'MW4Mercs" that is the game launcher, might need to run as admin or in compatibility mode.
If you get issues in game with fonts or menus you might need to do this extra step in properties, compatibility settings. Change high DPI settings button, check High DPI scaling override, drop down menu Scaling performed by "Application"
Let me know if you got it working.
I unpacked (both downloaded version available) rar and got one folder contains 2 (each) .iso files. All I have.
What are the names of the packed rars you got? I think you clicked on the wrong files or downloaded from a different page as both the "Original Iso" and MekTek version are packed in ZIP files and there are two other download options in that section ("Manual + Equipment Specs" and "Fix NoCD for original version").
For example the Original Iso ZIP on that page is named this \/ and is around 1.1GB in size.
MechWarrior-4-Mercenaries\Win\EN_Original-ISO.zip"
Edit: Wrong file name for original ISO,
MW4MERCS_01.iso (and 02).
(post is archived)