To get the achievements (you only get achievements after survive or enter the Achievements menu):
* The Survivor - Just survive. See the in-game walkthrough if you have trouble;
* The Governor - Shoot Jeremy and/or Father Bernard after dug the hole in the base. They will be used as meat bait;
* The Merciful - Give the painkillers and then the bottle of alcohol to Bill, then shoot him;
* The Shadow - Don't shoot - use the metal cutter on the hatch, the axe to kill Bill and the shovel to kill the zombie in the shop (the shovel will break);
* The Savior - Recruit Jeremy and Father Bernard and survive with both still alive;
* The Lone Wolf - Don't recruit Jeremy or Father Bernard and don't give the painkillers to Bill - to survive, fix the fence and connect it to the generator with the wires, power the generator with fuel, brick up the window, kill Bill with the axe to not make noise and get all four bullets for the gun (one in the hole in the wall outside the base, one outside the church, one outside the gas station and one inside the gas station near the chair).
Fuel glitch - get the fuel and use it in the car, then quit the game and then continue the game, and the fuel will appear in the inventory again. Use this glitch to get the car AND the generator on.