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