When you're on the main asteroid screen, press 'Return', then type 'Loadsadosh', and again press 'Return'. This procedure may be repeated as many time as you wish and will give you a small amount of additional money each time you use it.

After you've spied an enemy asteroid, first magnify it, and then access the missile systems. Target the enemy asteroid and it will show 100%. Fire the missile and the enemy will fire on itself.

Extract the missile button and select all weapons of a single type (e.g. vortex). Next select either an enemy rock or uninhabited asteroid as a target and click repeatedly on the "fire missile" button. Continue doing this until the text in the bar that shows the weapon count for your type becomes distorted, or the bar vanishes. You now should have an infinite number of weapons of that type.

On the disk operations screen, select play a saved game. When you are asked to insert a saved game disk, leave disk two in and press the 'Left' mouse button. When the list of saved games appears, click on the first slot. You will now be rewarded with an extra hard opponent.