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