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