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