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