I've not seen Global Communication mentioned, 76:14 really is masterpiece. (Gamers will recognize a tune featured on GTA IV)

Yeah, everything's interconnected as Tangerine Dream got to work on GTA V soundtrack. There is this note about that track on Wikipedia:

The track "5:23" is included in the 2008 video game Grand Theft Auto IV and appears on the soundtrack album The Music of Grand Theft Auto IV. In the digital release it is listed as "Maiden Voyage". This track is very similar to, but does not credit, the song "Love on a Real Train" by Tangerine Dream from the Risky Business soundtrack. They had remixed the song for a then upcoming Tangerine Dream remix album but had their effort rejected so released it as 5'23 instead.