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