List of achievement that are not self explanatory.
 
Source – [trueachievements.com] 
 
 

Make a wish

Witness a meteor shower in Countdown mode.
 
 

Go to effects mode
Go to coutdown
Press up on the D-pad or down arrow 10 times

 
 
 

Gold mine

Discover a land of golden Tetriminos.
 
 

Go to effect mode
Go to mystery
These are random so just keep playing mystery until you unlock.

 
 
 

TceffE ediS sirteT

.noisnemid desrever gniyonna na ni yalP
 
 

Go to effect mode 
Select game type of Mystery (one of the random abilities turns the board upside down)
These are random so just keep playing mystery until you unlock.

 
 
 

Weekend Warrior

Participate in a Weekly Ritual.
 

The weekend ritual starts on a Saturday at 
 12 pm in the UK
 7 am in the US EST
 6 am in the US CST
 4 am in the US PST
Choose Effects Mode and then play one of the highlighted events.
Complete the event (score and rank do not matter) and the achievement will pop.

 
 
 

Thank you for reading.

Hope this helps
 
 

 
 
This is all about Tetris® Effect: Connected – Tips How to Get Misc Achievements Guide; I hope you enjoy reading the Guide! If you feel like we should add more information or we forget/mistake, please let us know via commenting below, and thanks! See you soon!