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