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