Shadow Hog, workarounds exist. You can make an invisible intangible FOF set to Instant Kill and place it right on the floor of the sector (although no camera modifications this way, but those suck). You can alternately make an invisible intangible FOF set to Space Countdown spanning the entire height of the sector. But since you asked so nicely, I'll include a Space Countdown+Bottomless Pit sector type in 1.09 so the framerate can be 0.01 fps better.
Your full suggestion, however, isn't practical due to how sector specials work. Unlike most linedef specials, they aren't "initialised" at level load time; rather, it's checking all the time "What special does the sector the player's standing in have?" The answer to this question, like the special number you set in your map editor, must be a single number.
In regards to Gemini's suggestions:
Gemini said:
Get rid of the dynamic lights from the flames left behind by the Inferno Shield! They kill OpenGL framerates when you look at them!
Done.
Every physical ring in a level (not necessarily rings from item boxes) should be obtainable by any of the default players. (Sonic, Tails, and Knuckles)
I disagree. This precludes different paths for the characters. Don't you remember Launch Base and Lava Reef?
There should be a Perfect Bonus just like in Sonic 2 when you collect every physical ring in a level.
Again, disagree. What happens when you get the perfect bonus? After you've discovered every detail of every level, is there any reason to play anymore? Or have you just wasted the game?
The perfect bonus is ill-conceived, and I'm glad clearer thinking prevailed for Sonic 3 & Knuckles, so we don't have to copy it.
Like the flowers you get in SonicCD mode, the animals you release should stay in the game in single player mode and scatter through the level to make it a nicer place to be.
Open the console and type "soniccd on". It doesn't count as a cheat.
You should be able to assign different joysticks for player one and player two.
Done, I think.
The armageddon shield shouldn't give you chains in Chaos mode.
It shouldn't?
Armageddon is rare enough. It's not like we just didn't think of that situation, it happens all the time.
Sorry, no new game modes.