Thinking about it more, the one with two trails, didnt have two trails, from what I can remember now.
It did have a separate symbol on the reels, to take the level of the feature up one floor.
the main feature looked a little like
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One trail started the feature, icons took you up levels. I think when you got onto the feature, you then hi/lo'd across it. the last icon being the same prize, Win series or something. Thus the higher up you got, the less gambles you would have to make to get the jackpot.
The first two are exactly the ones I was thinking of. I had completely forgotten about the disc reel and lottery branding of the first game.
Yup, ricochet is also another one I had in my mind.
Ten out of ten is not one of the games. That is two seperate trails, but have no influence on each other. I shall see if I can com up with a diagram of what I remember.