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