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