Many of the cheats in StarTopia need to use the right shift key.
The right shift key is normally used in the game for camera movement 
so the first thing you need to do is enable it's use for cheats. 

Enable Cheats
Hold Down the [F11] key and type "RSHIFT". If you have been successful a random 
message from VAL will drop down - This means you can now use the right shift 
key while cheating. 

Speed the Game Up
How to enable it: Hold down [F11] and type "RSHIFTSPEEDUP" 
(a VAL message will drop down once you have typed RSHIFT and another one when 
you finish typing SPEEDUP). 

What does it do: If you hold down the right shift key and press the ">" key 
the game will speed up, the longer you hold it down the faster it goes. 

Others are... RSHIFT then
> = Speed up
< = Slow down
L = reset to normal speed
: = ... 

Scuzzer Cam
How to enable it: Hold down [F11] and type "RSHIFTSCUZZERCAM" 
(a VAL message will drop down once you have typed RSHIFT and another one
when you finish typing SCUZZERCAM). 

What does it do: puts you in peep cam mode on each of your scuzzers in turn 
and allows you to flip through them. 

Hold RSHIFT then
NP_7 = forward
NP_8 = backward 

NP means number pad (the square of numerical keys over on the right of a 
standard keyboard). When you use them the NumLock must be off. 

Speccy Effect
How to enable it: Hold [F11] & type [CLIVEROOLZ]. 

What does it do: See Tom's page for a description. 

Once = traditional 256x192 pixel Spectrum mode.
Twice = high-res Spectrum mode.
(i.e. using whatever rez you chose).
Thrice = back to normal.