NO nightmares, but everytime i heard a person talking on a walky talky,
security guards, cleaners etc. I looked around for the Combine soldiers :-))
..

Not that I recall, but it was Half-life that made the
biggest impact on me and I played that over eight years ago.

I have had dreams about two games mixed together. That's
really confusing. When me and some mates used to have
marathon LAN sessions we'd get stoned and play Orion II (a
strategy game) for 4 hours+ and then something drastically
different like Settlers for four hours plus in dispersed
with copious amounts of cannabis.

The results where dreams of star wars type battleships
landing in the middle of my peoples carefully harvested
fields and wondering in my concussed sleep if the ship on
the harvested field would effect it's grain output.

Don't do it kids, it's not big hard or clever. Much like
like me in fact.