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