Full list of all 35 Dead Island: Riptide Definitive Edition achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete all the main quests cooperatively with any number of partners
Mark 100 opponents which were then killed by your co-op partners
Finish all quests in the game
Obtain level 70
Finish the game
Defeat Harlow
Enter the docks in Quarantine Zone
Find all the secret files
Find all collectibles
Make pact with Serpo
Find all pages from the guide book
Find all the volunteer's voice recordings
Find and kill all the most dangerous monstrosities located in dead zones
Survive the horde on the roof
Finish quests for Dr. Kessler
Kill the Twins
Finish hospital quests for Cecil
Gain access to a long-range radio station
Find 50% of collectibles
Clear out the cinema
Reach Henderson
Kill special enemies: Grenadier, Thug, Wrestler, Infected, Suicider, Screamer, Butcher, Floater.
Successfully defend the tunnel entrance
Install a total of 5 barricades during hub defense
Kill 10 monsters with one mine
Rescue 20 NPCs that have been grabbed by monsters
Kill 100 monsters using the boat's speed boost
Kill 25 monsters with a chainsaw
Find a boat for use in the jungle
Kill 100 monsters with thrown melee weapons
Kill 100 monsters with a kick
Kill 100 enemies using charge attacks
Kill 50 monsters by smashing, decapitating or shooting them in the head
Escape from the ship
Obtain level 50