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