GOG until Monday, June 3.
The sale includes the Kings Quest, Quest for Glory, Zork, Space Quest, Police Quest, Gabriel Knight series and many, many more. They are all either $2.99 or $4.99. The entire portfolio can be yours for $121.
Also, there's no shame in looking up the answer to the Rumpelstiltskin riddle in King's Quest when you get stuck. We've all done it.