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