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