Despite still being in alpha, Introversion's Prison Architect (opens in new tab) has managed to shave, de-louse and lock up over 100,000 players, raising (according to the website) a not-too-shabby $3,256,895 for its creators. It seems crime does pay after all - just not for the criminals.
We last checked up on Prison Architect around two weeks ago (opens in new tab) , detailing alpha version 10, which among other things added Steam Workshop and Linux support. You can now alpha-fund PA via Steam's recently introduced Early Access (opens in new tab) section, which may have had something to do with that 100,000 figure.
The Alpha 10 trailer is below.