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 4.
Complete act 3.
Create weapons to rival the gods of fire or thunder.
Find 60 collectibles.
Drive a total distance of 10 kilometers.
Complete act 2.
Finish 75 quests cumulatively.
Kill 50 human enemies.
Play Dead Island at least 28 days after starting it for the first time.
Reach level 25.
Create a customized weapon.
Kill 250 zombies using blunt melee weapons.
Kill a zombie with 10 different melee weapons.
Complete act 1.
Kill 50 zombies using a vehicle.
Travel a distance of 20 kilometers on foot.
Breach a locked door with the first blow.
Kill 25 zombies with your bare fists.
Complete 25 quests while playing with at least one co-op partner.
Join another player's game.
Reach level 10.
Complete 5 quests in a single co-op game with the same partners.
Play in a co-op team of 4 different playable characters.
Customize 25 weapons
Kill 5 Infected in a row with a single 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 edged melee weapons.
Kill 250 zombies using firearms.
Kill an Infected with a grenade blast.
Sever 100 limbs.
Explore the entire island.
Heal yourself with a medkit 100 times.
Use a large medkit to heal an injury of 5% or less.
Complete act 1 with 4 different characters.
Reach level 50
Find 120 collectibles.
Save 5 people besieged by zombies.
Play with 10 different co-op partners for at least 15 minutes each.
Complete 5 quests with 3 co-op partners.
Kill 100 enemies with Fury attacks.
Kill a Suicider with a grenade.
Kill 250 zombies with modified weapons.
Kill 150 enemies using Analog Fighting controls.
Kill a Ram using tackle skill.
Kill a Butcher using an axe
Loot 25 Exceptional Weapons.