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