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