Is Sonic the Hedgehog: Spinball on Steam?

No. Sonic the Hedgehog: Spinball is not distributed on Steam, so there is no Steam Charts or SteamDB player count for it. Its live popularity is tracked here via Twitch viewership instead.

What platforms is Sonic the Hedgehog: Spinball on?

Sonic the Hedgehog: Spinball is available on Linux, Wii, Sega Mega Drive/Genesis, PC (Microsoft Windows), Mac, Game Boy Advance.

When did Sonic the Hedgehog: Spinball release?

Sonic the Hedgehog: Spinball released on November 23, 1993.

Sonic the Hedgehog: Spinball

Nov 23, 1993PlatformPuzzlePinballLinuxWii Sega Mega Drive/GenesisPC (Microsoft Windows)Mac

Sonic the Hedgehog: Spinball — frequently asked questions

Is Sonic the Hedgehog: Spinball on Steam?: No. Sonic the Hedgehog: Spinball is not distributed on Steam, so there is no Steam Charts or SteamDB player count for it. Its live popularity is tracked here via Twitch viewership instead.
What platforms is Sonic the Hedgehog: Spinball on?: Sonic the Hedgehog: Spinball is available on Linux, Wii, Sega Mega Drive/Genesis, PC (Microsoft Windows), Mac, Game Boy Advance.
When did Sonic the Hedgehog: Spinball release?: Sonic the Hedgehog: Spinball released on November 23, 1993.

About Sonic the Hedgehog: Spinball

Dr. Eggman (AKA Dr. Robotnik) is once again turning the animals of Mobius into robots using his monstrous contraption, the Veg-O-Fortress. Only Sonic can penetrate the Pinball Defense System to free the animals, retrieve the Chaos Emeralds, and put a stop to Dr. Eggman’s fiendish plans!

Summary via IGDB.

Sonic the Hedgehog: Spinball on Wikipedia

Sonic the Hedgehog is a video game series and media franchise created by the Japanese developers Yuji Naka, Naoto Ohshima, and Hirokazu Yasuhara for Sega. The franchise follows Sonic, an anthropomorphic blue hedgehog with supersonic speed, who battles the mad scientist Doctor Eggman and his robot army. The main Sonic the Hedgehog games are platformers mostly developed by Sonic Team; other games, developed by various studios, include spin-offs in the racing, fighting, party, and sports genres. The franchise also incorporates printed media, animations, films, and merchandise.

Source: Wikipedia (text under CC BY-SA 4.0).