Aftermath - very enjoyable string instruments, sounds really cheerful for an aftermath of an apocalypse though...
The Cyber Effect - very cyberpunk! has a lot of action in it, could be used as battle theme too maybe?
LWR - nice walking bass, dark piano, the 3/4 tempo gives it a sophisticated feel, and it does sound fittingly grim. Turns into a haunted mansion theme, gets real spicy at the end
Ol' Atlantis - mixes robotic synths with more gentle instruments like pianos and bells (I think those are bells?), really fits the description, my favorite track by far
Overall a really nice soundtrack! Well done!