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 5 quests with 3 co-op partners.
Play with 10 different co-op partners for at least 15 minutes each.
Kill 150 enemies using Analog Fighting controls.
Complete 25 quests while playing with at least one co-op partner.
Play in a co-op team of 4 different playable characters.
Kill a Ram using tackle skill.
Complete act 1 with 4 different characters.
Reach level 50
Complete 5 quests in a single co-op game with the same partners.
Join another player's game.
Explore the entire island.
Kill an Infected with a grenade blast.
Kill 10 zombies in a row with headshots.
Kill 250 zombies using firearms.
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.
Loot 25 Exceptional Weapons.
Kill 5 Infected in a row with a single blow.
Kill 25 zombies with your bare fists.
Play Dead Island at least 28 days after starting it for the first time.
Heal yourself with a medkit 100 times.
Complete act 4.
Complete act 3.
Kill 100 enemies with Fury attacks.
Find 120 collectibles.
Customize 25 weapons
Kill a Butcher using an axe
Complete act 2.
Finish 75 quests cumulatively.
Kill 50 human enemies.
Kill 250 zombies with modified weapons.
Find 60 collectibles.
Reach level 25.
Create weapons to rival the gods of fire or thunder.
Kill 250 zombies using blunt melee weapons.
Kill a Suicider with a grenade.
Kill 250 zombies using edged melee weapons.
Save 5 people besieged by zombies.
Complete act 1.
Drive a total distance of 10 kilometers.
Sever 100 limbs.
Travel a distance of 20 kilometers on foot.
Kill a zombie with 10 different melee weapons.
Kill 50 zombies using a vehicle.
Reach level 10.
Create a customized weapon.
Breach a locked door with the first blow.