Quoted from knockerlover:Alien A - PA0113 (obviously the newest w/ the pinball brothers boards, and the updated xeno boards/motor)
Alien B - PA0028
Alien C - PA0025
So I definitely have a hybrid compared to your A,B&C. According to Heighway my game was "production game #20".
Like your game A it has:
The "open" PC with plexiglass cover
DVI connected playfield screen
The IO boards are all blue
A sticker on the back indicating that it's an SE with a serial number
Unlike your game A mine has:
All "Heighway" labeled main boards
The main trunk runs up the middle (vs right side)
Older single Xenomorph board
So how many variations are there?