To me, retro has always been associated to fun. The Youtube video made by the guys who created this gem was fun. They are not trying to impress with wastefully expensive animation played on a 100+Hz screen and orchestra sounds booming from the speakers.
The guys from the Netherlands stick to the basics. Using only the Basic language, they invite us for a gaming trip on the good old C64. The title screen surprises the spoiled player with its basic cleanliness. A short introduction explains the game and the controls completely without graphical knick-knack. The colour scheme based on earthy tones prepares the enthusiast for what is coming and – a quick tap on the space key – you dive right in.
By the power of Grayskull.... All the children in the 80s knew this catchphrase. They watched the adventures of He-Man and his friends (and foes) on TV, bought the action figures, read the comics. And of course there were several computer games for the most common systems of the time.
Terraquake is the only 'non-arcade' one of those. Infocom had its biggest era at the same time, so Interactive Fiction was 'in'. Many other companies tried their luck, but only very few reached the same quality as their big idol. So didn't this team (which includes Mike Woodroffe, who later became lead designer of the Simon the Sorcerer series).