Here is the full list of all 23 Heart Chain Kitty achievements.
That was super nice!
Well, great! Thanks for supporting the horrors of capitalism.
Heartguy's goin' down!
No more evil left in the world!
Maybe reality is terrible?
You collected 100 Hearts! Impressive.
You got 250 coins! That's, like, a lot, man!
A true Game Master!
Master of all Video Game Masters!
Lonely & socially stunted Herbert would really need some friends.
Not sure if it helps, but thanks for talking to gramps for a bit.
Mum & Dad, together forever! (Maybe.)
Yes! Ride those Bottle Rockets!!
Here's ONE thing you're good at!
You can't understand him, but he still really likes you.
Well done finding that!
You've screwed every screw in Screwland!
You finally found your Daddy, weird trousers and all!
She'll never disappear on you again.
You completed Hardluck Sky! You're a True Gamer (tm) now!
Great! You clobbered a lump o' cheese into submission! The Cloud Warrior is proud of you.
What are you doing! Why would you 100% the 2d stages? 3d is the future. Get with the times!