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