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