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