The Short Grey

"The Short Grey is an adventure video game developed and published by Accrosoft, released in 1992 on Amiga and Atari ST. The player plays an alien who has infiltrated Earth with the aim of preparing an invasion. Jean-Christophe Jacquet wrote the script and the program, Pascal Arn created the graphics and Grégoire Dini composed the music. The demomakers from the Alcatraz group created the introductory cinematic for the Amiga version."

(Source: https://fr.wikipedia.org/wiki/The_Short_Grey)