Here is the full list of all 57 Dead Island Definitive Edition achievements.
During a single round kill an Infected, Suicider, Ram, Butcher, Floater, Walker.
Survive 5 waves in each of the 4 Arenas.
Survive 15 consecutive waves using the analog combat controls.
Survive 5 waves using only your fists and legs.
Play with 10 different co-op partners for at least 15 minutes each.
Survive 30 consecutive waves with at least one co-op player.
Survive wave 30.
Complete 5 quests with 3 co-op partners.
Play in a co-op team of 4 different playable characters.
Play any Arena in co-op.
Kill a Butcher using an axe.
Join another player's game.
Complete 25 quests while playing with at least one co-op partner.
Complete 5 quests in a single co-op game with the same partners.
Play Dead Island - Definitive Edition at least 28 days after starting it for the first time.
Set 10 zombies on fire simultaneously.
Kill 10 zombies in a row with headshots.
Kill 250 zombies using firearms.
Kill 25 zombies with your bare fists.
Kill an Infected with a grenade blast.
Explore the entire island.
Heal yourself with a medkit 100 times.
Use a large medkit to heal an injury of 5% or less.
Reach level 50.
Customize 25 weapons.
Kill 5 Infected in a row with a single blow.
Use a hammer to kill a series of 15 zombies without taking damage.
Kill 50 human enemies.
Kill a zombie with 10 different melee weapons.
Kill 250 zombies using blunt melee weapons.
Kill 250 zombies using edged melee weapons.
Kill 50 zombies using a vehicle.
Drive a total distance of 10 kilometers.
Travel a distance of 20 kilometers on foot.
Sever 100 limbs.
Complete act 1.
Complete act 2.
Complete act 3.
Complete act 4.
Finish 75 quests cumulatively.
Reach level 10.
Reach level 25.
Breach a locked door with the first blow.
Find 60 collectibles.
Find 120 collectibles.
Save 5 people besieged by zombies.
Create a customized weapon.
Create weapons to rival the gods of fire or thunder.
Kill a Suicider with a grenade.
Kill 250 zombies with modified weapons.
Kill a Ram using tackle skill.
Loot 5 Exceptional Weapons.
Set 5 enemies on fire and then kill them with explosives.
Complete act 1 with 4 different characters.
Kill 100 enemies with Fury attacks.
Survive 15 consecutive waves with each of the 4 characters.
Survive 10 consecutive waves using only custom weapons.