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