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