Stack-Up

Stack-Up
Also known as: Robot Block (JP/title screen) Developers: Nintendo R&D1, Iwasaki Publisher: Nintendo Platform: NES Released in JP: July 26, 1985 Released in US: October 18, 1985 Released in EU: 1987 This game has a hidden developer message. This game has hidden developer credits.

Stack-Up is the second entry in the two-game Robot Series (designed to be used with R.O.B., the first being Gyromite). While Gyromite could be bought by itself or in the NES Deluxe Set, Stack-Up was only ever sold by itself, which makes complete copies quite rare.

Bizarrely, like Gyromite, most Stack-Up cartridges merely contained a copy of the Famicom's Robot Block with an adapter so it could work on the NES.

Hidden Text

Present at the start of the ROM is what appears to be not only a build date, but a very special day. Similar text can be found in Wrecking Crew.

 Programed by   
                
  T.NAKAMURA    
                
  6/24 is       
    my birthday.
                
     1985/6/24  
  TOMOYO        
     chan       
                
                
                
  ROBOT 1       
                
     1985/6/24

Another message at 0x7FB0, which also appears in Gyromite, seems to be the build date of the sound engine:

 ROBOT  SOUND   
  5/5 1985      
 HIROKAZU.TANAKA