Alien's Return (also known as Col 'N', E.T. Go Home and Go Go Home Monster) is a video game released in 1983
Made by ITT Family Games for the Atari 2600.
An alien crashed on Earth and to get back to his planet he must find the four pieces of his spacecraft. Go into the several rooms and press the button. Hopefully, a piece of the ship will show on a corner of the screen. Pick it up and repeat the procedure until you can go back home.
Beware of the guardians, though, as they would follow you to trap you.
The European version of the game was released with the title UFI und sein gefährlicher Einsatz (German Title; translated to: "UFI and his/her dangerous commitment") , also known as E.T. Go Come.