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