Zen Studios developers of Pinbal FX2 are offering up pretty much all of the Star Wars and Marvel related tables they have released so far. Going for around 6 USD at the time of this post.
If you pay for the 2nd tier minimum you also get....
- More Marvel tables ( X-men, Thor, Deadpool)
- More Star Wars ( based on the Prequel trilogy)
If you can get past the "floaty" ball physics then you will be treated to tables that have some great action sequences that a physical table just couldn't really pull off all that well.
Of course you will need a Steam account and Client to redeem the Steam Key codes to play and install the game on your computer. the other cool thing about buying from this site/sale is that you can choose which groups involved should get more of your money. Zen Studios, The charities or Humble Indie Bundle.