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