Turbo is the first title in the arcade racer/builder series to be released on both PC and consoles. Contrarily to Tm² it features 4 environments out of the box and is not linked to the ManiaPlanet network.
Seems like, as of some update after the original report above, Surround stopped working for this game. It still allows me to select my usual Surround resolutions, both in the config and in-game, but the actual game displays only in the middle monitor. The two side monitors go to sleep. I don't have this problem with any other game. However, I only just now bought this game, so I never tried it before Surround support broke.
Surround is still working for me (Win7, Titan Xp, 381.65)... Not sure what could cause this, there's only been one minor patch for Turbo, and the Tm engine has always been multi-mon capable. Is there anything unusual about your display setup like mixed brands/models ? Got the same kind of issue in any other games ?
(FYI Ubi games are not "breaking suddenly" more than others, it's all up to the devs not to screw things up ! R6S is fixed by now.)