I don't think it's really fair to include System 11 games in this list (F-14, Fire, Cyclone) because they're not really "early" SS games (they use alphanumerics instead of digits only). Besides, there's already a poll for them.
Yeah, there's quite a difference between late 70's and late 80's SS machines.
Bally produced 5250 units between the original Centaur and Centaur II, which was the same game re-released in 1983 with a smaller backbox as a cost-saving measure. The early 80s were a pretty desperate time for pinball; manufacturers were slashing costs and releasing low-volume production runs in an attempt to survive, and a lot of games got sequels or remakes (Centaur II, Eight Ball Deluxe, Firepower II) as they were cheaper to develop than a table from scratch.I guess Centaur had a much smaller production run that I'd thought.
Which method unfortunately left off Spectrum, a little-loved (only ~500 units sold out of 994 produced) yet amazingly fun cross between pinball and Mastermind (a color-code guessing game). Basically there are four colors and you have to guess the computer's code by hitting the appropriately colored drop target bank, while avoiding the wrong color banks once you discover what those are. Combined with an odd playfield - no plunger (the right flipper button fires the ball up out of the center drain), no outlanes, and hidden areas along the sides with locked balls that get fired out so the player doesn't have to wait for the ball to descend the length of the table to resume action - it's delightfully quirky.I just pulled a sampling of SS tables based on the date range and how many tables were produced.