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