I saw that deal, which was a great one. I picked up on a previous Steam sale for around $20 and have enjoyed it a lot.
Yea, I have to agree. I grabbed it a while back via HumbleBundle and immediately regretted not buying a cp earlier. It was on my radar as "compelling" but I've purchased so many games that looked compelling that ended up being fairly disappointing, but not Prison Architect - great game thus far.
The sale was pretty fortuitious - my friends were pretty hooked/intrigued by the alpha 27 dev video, so it was nice to be able to pick up a copy for them for only $6 a pop. My one friend had already put in 2 days of play by the 2nd day he owned it, so easily worth money from the get-go.
Seems like I've purchased a lot of games (both for myself and friends) that don't really ever get played --- it's nice to buy one that gets some time logged on Steam.
cheers,
-tid242