The G400 driver CD came with a special version of Expendable which supports Environment Mapped Bump Mapping. It also had this Matrox Tech Demo which was pretty amazing for the time.

I think there was also a DVD player program on that CD but I'm not sure which one.

Does the Win3x driver of the G400 work with the G4x0 and G550 too?

I remember that game screenshots in most reviews and the use of the EMBM was really amazing for its time. The dvd original software player should be a custom rebranded version of the Ravisent engine that also ATi player used (with more hw acceleration) and mostly cpu based. But I don't know how it was released considering the oem company usually the engine was dedicated, in this case was Matrox itself for their own video cards only so I'd expect this to be in the retail package CDs or a later sw release but if the G400 retail disc files list seems having a dvd player, I wonder if the Bulk CDs had only the drivers. I suppose there were different card/disc packages, a retail version and a bulk version. I will look for a retail card with its disc, but usually the few ones that comes with usual cards are the Bulk ones.