A long time ago I bought myself a copy of the (sadly extinct) Loki Games Linux port of Heavy Gear 2, Activision’s version of Mechwarrior. It was great fun to play, except that there was a known problem with the game segfaulting at the end of any mission because of an nVidia driver issue. Which made the campaign section impossible to play. 
The other day, I though I’d give it another try, and with a bit of help from t’intarweb it now all works.
If you follow the instructions here and here, then all should be joyful for you.
mrBen