LOGO FLAGS
LOGO_FLAGS is a gamevar that controls the appearance of the logo.
It is a bitfield. The values are:
1 - LOGO_FLAG_ENABLED
2 - LOGO_FLAG_PLAYANIM
4 - LOGO_FLAG_PLAYMUSIC
8 - LOGO_FLAG_3DRSCREEN
16 - LOGO_FLAG_TITLESCREEN
32 - LOGO_FLAG_DUKENUKEM
64 - LOGO_FLAG_THREEDEE
128- LOGO_FLAG_PLUTOPAKSPRITE
256- LOGO_FLAG_SHAREWARESCREENS
512- LOGO_FLAG_TENSCREEN
The default is 255 (that is, all the bits are 1, for exception the last two ones).