Dead Island Hints
Killing Large Groups Of Zombies
1) When you run into a large group of zombies or you have them chasing you, look for a near by car and sprint to it and jump on the hood. While you are on the hood you can still hit the zombies. Note: When you are on the hood the zombies can hit you rarely, Don't jump on the roof of the cars because some times you might not be able to hit the zombies and you can use the analog fighting controls to swing your weapon faster and do more damage to the zombies.
Killing Zombies Without Using Your Weapons
2) Using your weapons on zombies will damage it till you cant kill them as fast. If you have a weapon that is worth keeping you can through your weapon at the zombies and your weapon wont take damage, keep throwing your weapon at the zombies until you can repair it again if it is almost dead. or you can kick the zombies to death.
Easy XP
3) At the start of the game when you are in the hotel and the voice tells you to go to the maintenance room, keep going down the hall until you have to run away from the zombies. DO NOT GO INTO THE MAINTENANCE ROOM. Once you pass into the next hall you should see a zombie in a doorway to your left, directly after that there is a door you can open. Open the door run in and only let one zombie in. Make sure you close the door behind him then once inside start kicking him until he falls down then crouch and keep punching his head. It will take about a while because the zombie is level 50. Once he is dead you should get around 1300 XP. Just retrace your steps to get another zombie. You can do this as much as you want as long as you don't run into the maintenance room.
Easy "Military-Industrial Complex" challenge
4) While doing the "Bitter Return" mission, there is a mounted machine gun on the balcony of City Hall. Mount the machine gun and fire it. Every bullet fired counts towards the "Military-Industrial Complex" challenge. Keep shooting to easily complete all four levels.
Easy Ammo For The pistol/Revolver
5) When you are in the Resort, head to the hotel and when you enter you will see a police car. Go over to the police car and in the passengers seat you will see pistol ammo, it should come with 15 bullets. To get more of this ammo just leave the area and the come back it will regenerate every time.
Kill Thug Easy
6) The easiest way to kill a Thug is to have a kanta with shock mod modified onto it. Hit the thug until he gets electrocuted, and keep hitting him until he is dead.
Easy Zombie Kills/XP
7) While driving a car or the truck you collect from the motel, drive into the back of a zombie and the zombie will die instantly and you will get about 50 XP for killing one zombie.