The SoLA Add-on for Dead Island 2 has 6 achievements.
Defeat The Dirge and silence the Beat
Help calm Grace by suppressing the Beat
Survive your first Clotter encounter
Ram into 5 zombies in a single charge
Slay 5 zombies with a supercharged Ripper, and bisect 5 more with a Sawblade Launcher
Clean up the large Caustic-X spillage in Utopia