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