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