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