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