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