The MTX program doesn't have a virus, just the MW4Mercs.exe file. A CD key wasn't needed, even without the patches. I normally scan everything I download before I use it, but I thought a Microsoft sponsored game would at least be infection free . . . I guess I didn't question the torrent well enough . . .
I haven't played Mechwarrior since MW2 came out, a decade or so ago, so everything is different for me
That said, my Goliath II has a 60 damage 1000m range 8 second reload railgun
I gave every mech on my team a 28 damage cannon (the type that explodes on contact). Whenever a light comes near us, it literally flies across the screen from the kick back. Hilarious . . .