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