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