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