The Journey Down: Chapter One has 42 achievements worth 3000 gamerscore

The Journey Down Fast Lane 0 Complete the game in 40 minutes or less	150
Over The Edge 0 Complete the game	100
Those Wires Were Fast As Lightning 0 Complete the puzzle in the engine room in 3 minutes or less	100
Fan-tastic 0 Give the repaired fan to Kito	50
We Obey The Rules Of Aerodynamics 0 Steal the yacht's engines	50
That Fit Wheel-y Good 0 Put the Steering Wheel along with the Iron Bar on the plane	50
Straighten Up 0 Repair the anchor's winch	50
Hot Surprise 0 Knock out the pelican with the chillied-up fish	50
Cheese Freeze 0 Scare Matoke with a rat	50
11 Kinds Of Herbs And Spices 0 Complete Mama Makena's secret spice mix	50

Secret Achievements

I'm The Captain Now 0 Look at the painting of Kaonandodo in the charter's waiting room	75
My Pilot Is Afraid Of Heights 0 Look at the photography of Kaonandodo and Bwana in the charter's room	75
“What A Lovely Bike That Was” 0 Look at Kito's photographies on the plane	75
Wake Up, Sheeple! 0 Look at the graffiti	75

The Journey Down: Chapter Two

There are 14 achievements with a total of 1000 points.

Into The Mist 0 Complete the game	150
Out Of The Mist And Into The Embers 0 Reach port	75
Like Another Pair Of Brothers 0 Escape from prison	75
Dumpster Diving 0 Get thrown out from Club Temba	75
To Infinity And Below 0 Escape from Port Artue	75
They Call Me Prometheus 0 Bring fire to Moe and Vince	50
Let There Be Light 0 Change the lighthouse's lamp	50
Old Faithful Is Spinning Again 0 Give the Navigation Guide to Morten	50
Dead-Wheel 0 Give a new wheel to Reynolds	50
Claw Machines Are Easier 0 Use the crane to rescue Kito	50
The R In The Rating Is For Romantic 0 Obtain the steamy tape	50
Mission Implausible 0 Recover the journal	50

Secret Achievements

More Like Club Pigface 0 Prank call Club Temba	100
Succeed In The Power Bussiness 101 0 Read the two magazines on the Armando Co office	100

The Journey Down: Chapter Three

There are 14 achievements with a total of 1000 points.

Tales From The Underland 0 Complete the game	150
St Armando Magnitude 8.0 0 Rescue Professor Moorhead	75
What Would Bwana Do? 0 Escape from the Sisulus airship	75
She Toots As She Pleases 0 Get the Horn of Awaquán	75
Bwana Demolitions Ltd 0 Place the bombs on the skyscraper and escape	75
There And Back Again 0 Return to St Armando	50
Bombs Away! 0 Trap the Armando Co goon in his van	50
Waasi the Wall-Crusher 0 Raid the Armando Co skyscraper	50
Karmic Payback 0 Get revenge on Erza	50
I Just Lived In Your Arms Tonight 0 Resuscitate Gabi	50
Troll Physics At Their Finest 0 Use the magnet on Sabo's TV	50

Secret Achievements

Bwana The Menace 0 Annoy everyone with the airhorn	100
Just Missing A Little Rum 0 Send the monkey to gather all possible fruits	100
It's Free! 0 Get free juice from the friendly vendor	50