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