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 4.
Complete act 3.
Kill 100 enemies with Fury attacks.
Find 120 collectibles.
Kill 50 human enemies.
Customize 25 weapons
Complete act 2.
Finish 75 quests cumulatively.
Kill 250 zombies using blunt melee weapons.
Kill a Suicider with a grenade.
Find 60 collectibles.
Kill 250 zombies using edged melee weapons.
Reach level 25.
Kill 250 zombies with modified weapons.
Kill a zombie with 10 different melee weapons.
Travel a distance of 20 kilometers on foot.
Sever 100 limbs.
Create weapons to rival the gods of fire or thunder.
Complete act 1.
Complete 25 quests while playing with at least one co-op partner.
Save 5 people besieged by zombies.
Play Dead Island at least 28 days after starting it for the first time.
Reach level 10.
Create a customized weapon.
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.
Kill 5 Infected in a row with a single blow.
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 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
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 5 quests with 3 co-op partners.
Kill 150 enemies using Analog Fighting controls.
Kill a Ram using tackle skill.
Kill a Butcher using an axe
Loot 25 Exceptional Weapons.