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