Here is the full list of all 11 Task is to Survive achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
10 shots with rifle
Kill 400 monsters
Kill 300 monsters
10 shots with the machine
Kill 200 monsters
Die 10 times
Up 10 times first aid kit
Use the kit (Key "E") 10 times
Up 10 times the ammo
Kill 100 monsters
10 shots with a pompgun