We have finished early testing or Rogue Alley and have a soft feature commit that is explained here: 

https://mafiareturns.com/help/rogue_alley.php

As of now, it is not giving out rewards live, they are being stored to be manually reviewed mid week to check for any bugs before it is turned on live/realtime for general use.

On this MR version, it is announced on Lounge.  In the new version it is announced in game & chat.

The winner of the event gets a +1 to their gun, unless you are in tapering, then you get what tapering works out to be.

There are achievements for 1st and 2nd place finishes.  Also a few hidden ones that only happen on certain scenarios.  These will not start officially until midweek and will not reflect previous done work during testing.

The current maps we are using are laid out to be intentionally easy.  Normally 6 items, right in front of you, laid out in an easy to see format so you know what to select from.  When testing is fully over, the maps will revert to the actual maps which are a little more difficult.  You will learn where the shootable locations are through experience, which will give you an advantage over others (which doesn't exist when all 6 spots are clearly lined up in a row for you in the beta maps)