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