I managed to make remakes of old famous demo crews on the Atari ST.
All the original logos were made in the 80 and 90's.

On the left you can see the remakes I made and on the right you can see the original ones.

It is a remake from zero for each one, pixel by pixel, trying to give a more modern style but keeping the 16 colors of the Atari ST.

Original logos were made in the 80 and 90's by...
ES for The Union and TEX
Tanis for Carebears and Delta Force
Spaz for ULM and Lost Boys
Link for Replicants
Smiley for Equinox
Boozter or Red (difficult to be sure...) for Sync