Here is the full list of all 45 Matrix Hearts - there are Season 1 achievements.
You collected the master amount of Matrix Hearts in the episode.
Completed Chapter 3
Agree that those picture are a top-notch plan for victory.
You and Rylee make the perfect weapon.
Like no one ever was!
You activated your one chance to get Rylee for the mission.
Rylee gave you a personal tour of her room.
Began the romantic adventure for Stormy.
Was it the perfect date? Who knows. Stormy liked it, though.
That's probably what love is, right?
Began the romantic adventure for Xia.
Captured all the best moments on camera with Xia.
Xia captured Kanji in the water. Important for the future?
Gemma's team now has plus one Canadian, eh.
A shark friend gave you the ultimate gift.
The ocean is beautiful!
A kiss on the cheek?
Gifted Layla with her Ultimanium Prize. What a prize!
You were the best one to reach the top!
Friend more animals, win more.
Because this is a role-playing game!
Agreed to partake in a Monster tournament.
You're pretty much Jackie Chan.
You look like a real Olympian now! Kinda.
Chose all the right options during the storm!
Completed Chapter 2
Befriended the bird. You're almost a pirate now!
Met a very mysterious girl...
Accomplished the treasure hunt with Xia.
Layla gave you a tour of the Prolifiant museum
You sailed home with Captain Stormy. Greatest captain ever!
Went to a party and made new friends. Wohoo!
Make an Otterly-Ultimate Choice! These are kinda important.
Completed Chapter 1
Max Hearts with all women in Chapter 1
Had your first one on one with the ocean-loving Gemma.
You got a peek behind Xia's... lens.
Yup. She's a piece of work.
Who knew a little redhead had so much crazy?
Collecting Matrix Hearts takes the right choices!
Met Layla for the first time. She's smarter than you.
You made your first choice in the game. Congrats!
Max Hearts with all women in Chapter 2
Chrysta is going to make you money. Maybe.
Max Hearts with all women in Chapter 3