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