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