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