And they talked about the persistent world military survival mod, and it won him a job at Bohemia building an ambitious multiplayer prototype for Arma 3. At the same time, the army, which he was still enlisted with - and feverishly volunteering for as many exercises as he could, while he still could - announced it would be posting him to the middle of nowhere in New Zealand, to a place called Waioru. It was here, with nothing to do for 90 per cent of the time, he added the final ingredient to the mod that would make it DayZ: zombies. His brother is a virologist - an expert in viruses - and you'd be terrified by the things he knows. Hall needed a threat, and his brother gave him one.