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