Mechwarrior 2  

Hold Control-Alt-Shift while typing:

            superfunkicalifragisexy - Invulnerbility
            iseenfireandiseenrain - Unlimited Ammo
            ooohhhlllaaalllaaa - Heat tracking
            itsdabooomb - Makes targeted enemy self destruct (doesn't work on
            things that are not high lighted in red brackets)
            crazysexycool - Infinite jumpjets
            inmybeautifulballoon - Adds jump jets
            likethecomstarbaby - Automatically succeed in mission (it doesn't
            set your mission goals as successful though)
            ontimeeverytime - Time compression key enabled
            antijolt - Time expansion enabled
            bubbleboy - Bounding spheres
            beholdmyglory - Imfree-eye mode on
            undflashyflashy - AutoGrouping enabled (makes all weapons fire from the first trigger)
            walkthisway - Leading Recticle enabled (makes enemies follow your
            targeting crosshairs towards you)
            wediditagain - Same as dorcs in MW2
            redjackandtikrules - Destroy targeted enemy
            Hint:
            If your 'mech has weapons that take a long time to recycle (Arrow 4,
            ect.) shut down and turn on again and all guns will be charged.