Here is the full list of all 19 Slaycation Paradise achievements.
You've cleared all Tours on Hard difficulty. You beast.
You've discovered all the sights of Hell. Don't worry, you'll be back to visit eventually.
You've discovered all the sights of Terra Feralis. Goodonya, digger!
Discovered the Stallions secret...
You've discovered all the sights of Hicksville. Git 'er done!
You've cleared all Tours on Easy difficulty.
You've discovered all the sights of New Amsterdam. Disgusting.
A First Class ticket qualifies you to be annoyed by a whole new social class of idiots.
Killed 200 Luchadore's with melee.
Killed 300 Ferals with explosives.
Killed 10 boss class enemies.
A Business Class ticket allows you to fulfill your priveleged entitlement, without actually being rich or successful.
Discovered the haunted train whistle.
You've discovered all the sights of Metro Mexicano. Buen trabajo!
You've discovered all the sights of Metagate E36.
Killed 300 Living Sex Dolls with fire.
Drove off Disco Mime 3 times.
You've upgraded to Premium Economy, earning you the right to act pompously and look down upon standard economy Tourists.
You've successfully finished the Childrens Orientation Course, and received an Economy ticket.