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