Written in VB6, a long time ago but somehow works in Windows 10. Clear proof that I have been obsessed with Set for quite a while.
To Install download Setris.zip. Extract the files to a folder anywhere you’d like. Double click Setris.exe.
To play click three cards on the screen that form a set and click the set button. Be speedy. If the screen fills up with cards you will soon lose the game.