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