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