Here is the full list of all 17 Big Tower Tiny Square 2 achievements.
Does this look familiar?
Geometric Geothermal Gridlock
Eye See You
You Bounced Your Way To Success!
Purple Portal Meet-er
Bottom's Up!
Like a Record, Baby.
Back to The Future
Technically a Split Level...
Water...Why'd There Have To Be Water!?
Turned That From Upside Down!
Leapin' Lava Like A Pro
Verti-Californication
Those Portals Were No Lie!
You Beat all the sections!
You Reached The Top of Big Tower 2!
You Reached The Bottom of Big Tower 2