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