Ok, here it is.
http://rapidshare.com/files/410753505/UFOAI_CITY_AMBIENCE_ATMO.rarA complete Package in which following files are included:
UFO_NIGHT_ATM - Generic Night Ambience Track
CITY_ABND_UFOAI_ATM - The abandoned City Ambient Track
CITY_ABND_UFOAI_CRANE_ATM - An alternative with a crane working in the distance
CAR_ENGINE_RUNNING_DIRTY - An old Car engine running
ALARM_CAR_DYING - Car Alarm which dies after awhile. Please don't use this or make it VERY quiet as Sirens and Alarms are very annoying.
I've included the last one because you wanted it. The City Ambience in the actual Version of the game (2.3) seems quite annoying to me as all you see are very few buildings and nearly no civillians but what you hear are Police Sirens, Traffic etc. That doesn't fit quite well with what you see in the actual game so i would suggest to use very little SFX like maybe a distant car engine. The ambient tracks should do the most.
All files are in ogg Format @ 128,0kbps
Question:
Please look at the other tracks in Sounds and Music. Are you still in need of geosphere and/or footsteps sounds?