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.
Complete act 3.
Play Dead Island at least 28 days after starting it for the first time.
Kill 250 zombies using blunt melee weapons.
Finish 75 quests cumulatively.
Heal yourself with a medkit 100 times.
Complete act 2.
Find 60 collectibles.
Kill a Suicider with a grenade.
Kill 50 human enemies.
Reach level 25.
Travel a distance of 20 kilometers on foot.
Complete act 1.
Kill 5 Infected in a row with a single blow.
Sever 100 limbs.
Save 5 people besieged by zombies.
Kill 250 zombies using edged melee weapons.
Drive a total distance of 10 kilometers.
Kill 50 zombies using a vehicle.
Kill a zombie with 10 different melee weapons.
Reach level 10.
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 10 zombies in a row with headshots.
Kill 250 zombies using firearms.
Kill 25 zombies with your bare fists.
Kill an Infected with a grenade blast.
Explore the entire island.
Use a large medkit to heal an injury of 5% or less.
Complete act 1 with 4 different characters.
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 in a single co-op game with the same partners.
Complete 25 quests while playing with at least one co-op partner.
Complete 5 quests with 3 co-op partners.
Kill 100 enemies with Fury attacks.
Create a customized weapon.
Create weapons to rival the gods of fire or thunder.
Kill 250 zombies with modified weapons.
Kill 150 enemies using Analog Fighting controls.
Kill a Ram using tackle skill.
Kill a Butcher using an axe
Loot 25 Exceptional Weapons.