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