If you think your save game in Crime City has gone missing, do the following…
- Reset your phone
- Wait for the USB media check to stop (and close all other apps)
- Load the game
If that doesn’t work
- Go into task manager,
- Kill all running non-system apps, including backup/sync programs etc.
- Try again
If it can’t access storage (such as when startup is happening) it’ll flip out and not be able to get/save to the cached files it needs to. I dare say this probably happens with Modern War by Gree.