Hi all,
Just thought I'd let you know my findings. With XMAME, The Invaders will not playback correctly unless the frame skip used is the same as that recorded. If, while playing, some of your shots seem to go through the aliens, you're not running at frameskip 0 - the collision detection is somehow linked to the frame skip.
Not sure if this is the same for other MAME versions.
The Invaders (tinv2650)
Moderator: Chad