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