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