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