Thimbleweed Park game developers Terrible Toybox are currently developing Return to Monkey Island (the newly announced sequel to the original Monkey Island 2: LeChuck's Revenge game from 1991) - so if you appreciate adventure/nostalgia gaming of that ilk (e.g. produced by LucasArts / designed by Ron Gilbert), then this current deal (for Thimbleweed Park) is worth a look
- Technically, the current $8.68 discount price on Steam is not quite the all-time historic lowest (link, thanks @HomeAlone)
(according to ITAD, that would be $7.99 at GOG back in March 2020)- but it so happens that Steam's deal is the only current sale discount going around at this time - Steam discount ends April 8th (U.S. time I think)
I think the historic low was when it was free.