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