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