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