Here is the full list of all 48 Dead Island achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Play Dead Island at least 28 days after starting it for the first time.
Loot 25 Exceptional Weapons.
Kill 250 zombies using firearms.
Complete act 1 with 4 different characters.
Reach level 50
Explore the entire island.
Kill 150 enemies using Analog Fighting controls.
Kill a Ram using tackle skill.
Customize 25 weapons
Play with 10 different co-op partners for at least 15 minutes each.
Kill 10 zombies in a row with headshots.
Kill 250 zombies using blunt melee weapons.
Use a hammer to kill a series of 15 zombies without taking damage.
Complete act 4.
Complete act 3.
Kill a Butcher using an axe
Kill 250 zombies with modified weapons.
Kill 100 enemies with Fury attacks.
Use a large medkit to heal an injury of 5% or less.
Find 120 collectibles.
Create weapons to rival the gods of fire or thunder.
Set 10 zombies on fire simultaneously.
Heal yourself with a medkit 100 times.
Complete act 2.
Reach level 25.
Complete act 1.
Complete 5 quests with 3 co-op partners.
Play in a co-op team of 4 different playable characters.
Kill 50 human enemies.
Drive a total distance of 10 kilometers.
Save 5 people besieged by zombies.
Kill an Infected with a grenade blast.
Kill a Suicider with a grenade.
Find 60 collectibles.
Finish 75 quests cumulatively.
Travel a distance of 20 kilometers on foot.
Sever 100 limbs.
Complete 25 quests while playing with at least one co-op partner.
Complete 5 quests in a single co-op game with the same partners.
Kill 50 zombies using a vehicle.
Join another player's game.
Kill 250 zombies using edged melee weapons.
Kill 5 Infected in a row with a single blow.
Reach level 10.
Kill 25 zombies with your bare fists.
Kill a zombie with 10 different melee weapons.
Create a customized weapon.
Breach a locked door with the first blow.