Nino, there is no planning in my collection, otherthan to grab games iIplayed as a teenager
Both Star Trek and eightball fit that catagory

You would almost be sneaking in a Mata Hari or Evel Knievel - both great players. Another from that period that is a real sleeper - Power Play. Those early Ballys were awesome games. Then Bally moved on to the fully featured games like Medusa, Fathom, EBD and Centaur. Personally, I love all the Ballys except Elektra and Future Spa.