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