You don’t happen to remember the name of an Amiga game where you navigated a little robot around via CCTV while avoiding security guards, in order to break into a safe?
Hmm I don't recall any game where the object was to to break into a safe... There was Quadralien, where you control robots to repair the central solar system reactor "Astra", which has begun to break down. You have to repair circuits and clean up the radiation leaks before the station blows.
The next closest I could think of is Infestation (one of Psygnosis' lesser known games), where you are sent to investigate a space colony that has been wiped out by an alien life form. Even getting into the station itself before running out of oxygen is a challenge.
The game has no instructions, and starts off with a password that you have to guess to continue.