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