WAlking speed too slow - is there a console command...

[Kr3v]

After, create a folder in Data named LSCRIPTS and put in it your new folder (Main) where tweak.lua is located. So you'll have that : NecrovisioN\Data\LSCRIPTS\Main\Tweak.lua. Otherwise, it won't work.

[valerian]

I remember earlier this year I downloaded the demo of Necrovision and installed it. But I could enjoy the game -- the framerate was ridiculously slow, something like 5-10 fps. The others also reported the slow framerate. I thought the game was unoptimised, and decided against buying, and deleted the demo from my harddrive. (I have ATI HD3870 card on my AMD X2 2.3 GHz computer.)

But now I see that people play this game. Was there a patch released which improved the speed of thegame ?

[Kr3v]

There is a patch, but honestly perf didn't change a lot.