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