Vonderhaar has let us know of another game settings update – the most recent being only yesterday. v.43.x.31.5 fixes. Challenges, zombie exploits and specialist weapon progression addressed.
43.x.31.5 – Grenades count towards Gung Ho challenge when sprinting. Specialist weapon progression in round based games. Zombies exploits.
— David Vonderhaar (@DavidVonderhaar) January 7, 2016