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