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