I doubt this - it is impossible to kill 10% of the population in the game. As anyone can see on the final screen, max number of deaths in the game is about 1500

I doubt this - it is impossible to kill 10% of the population in the game. As anyone can see on the final screen, max number of deaths in the game is about 150000, which is 1.5% (Czechia population is approximately 10M)