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