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
Unrelated
...
Harder than it looks
You dug a hole
Open 50 packs
Lucid once
Mania
Some people graduate but they still stupid
It's a secret to everybody
A small loan of 1 million dollars
Old habits die hard
Yum
Get a turquoise
Take a look at me now
Get a fuzz
Get a green
yeah
Get a purple
2017
Get a red
Get a blue
Sometimes there is a free lunch.
Get a brown
Get a white
Is this a bug?
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.