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