Here is the full list of all 35 Microtransaction Simulator achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Open 100 packs
You dug a hole
Is this a bug?
Harder than it looks
Some people graduate but they still stupid
Mania
A small loan of 1 million dollars
Lucid once
Unrelated
Old habits die hard
Yum
Open 50 packs
Get a turquoise
Get a fuzz
Take a look at me now
yeah
Get a red
...
Get a blue
Get a purple
Get a green
2017
Sometimes there is a free lunch.
Get a brown
Get a white
It's a secret to everybody
This can't be a mistake
Past the point of no return
Don't even try it
literally idle the game for 4 hours. Stay at home and don't spread the coronavirus.