There's no such thing as a *windowed* mask ROM.
Mask ROMS are fabricted, much like an IC and are done by the ROM manufacturer. These cannot be erased so there is no need for a window. UV EPROMS have the windows and can be erased and reprogrammed by consumers.
Most mask ROM manufacturers also make OTP EPROM and sometimes FLASH varities, which people tend to confuse as a mask ROM because they are plastic and don't have a window.
Pay attention to the part numbers listed on the chips. For this particular game, Captain Tomaday has a 32Mb V1 and an 8Mb V2. This is the known official configuration for this game, and on Toshiba *mask* ROMS (the TC53xxx numbers). The bootleg above has 3x 16Mb Macronix FLASH memories (29F1615) used as the V1, v2, and V3 chips.
What are we going to do when the pirates start using a little acetone to disolve the MX part numbers and screen print new info? It's probably already going on.
Jeff