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