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