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