ITS EASY:) tested on win 10
1. download fiddler web debugging tool
https://www.telerik.com/download/fiddler2. GO TO tools/options/connections
FIND Fiddler listens on port: ---- change to 8200
3. start zero k with internet anabled
4. go to fiddler left hand window
find
zero-k.info /ContentService.svc
it is first entry after repos.spring.com /tadrd/versions.gz
u cant miss it its first item with page with green arrow
5. on a right find AutoResponder with green thunderbolt icon
drag and drop zero-k.info /ContentService.svc to bottom window
tick Enable rules
save its next to rule editor
6. close zero k go offline
7. START ZERO K PLAY OFFLINE :)
!!! u can close fiddler it will save your rule so next time to play offline just start fiddler and YOU CAN START zero k without internet connection!!!
PLEASE CHECK AND LET ME KNOW IF IT WORKS FOR YOU