I made something long ago. It works by adding an objective to the map (Hostage).
Although I tested it quickly, I'm not really sure if I added all checks for round draw.
I really recommend using round terminator instead of this, as this is a poor way...
If you use any win message editor plugin, you must put this as the first plugin in your list
__________________
اَشْهَدُ اَنْ لَّآ اِلٰهَ اِلَّا اللہُ وَحْدَه لَا شَرِيْكَ لَه وَ اَشْهَدُ اَنَّ مُحَمَّدًا عَبْدُه وَرَسُوْلُه
No longer active in AMXX. Sorry.