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