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