Here is the full list of all 10 1993 Space Machine achievements.
Defeat Nestor without using the Megablast weapon.
Defeat Nestor in less than 3 minutes.
Finish a level with one life.
Defeat the malfunctioning Space Machine.
Own 4 fully upgraded weapons.
Kill no enemies except bosses.
Die exactly 42 times during the whole game.
Absorb 1000 bullets with your shield.
Take no hits on any level.
Be careful when playing with fire.