Die without killing any enemies
Kill 20 enemies in darkness
Kill an enemy from 20+ meters during fog
Survive 1 hour in Nightmare mode
Land 100 headshots in a row
Land 15 headshots in a row
Land 50 headshots in a row
Land 250 headshots
Land 50 headshots
Land 999 headshots
Slay 1,000 enemies
Slay 10,000 enemies
Slay 5,000 enemies
Slay 50,000 enemies
999
580342
1164094
749863
310147
143076
110329
16790