Steam key.

Great game, would really like to get the Wii U version at some point.

Great game. One question is it a Steam key?

Picked this up a long while ago, it's a great arcade kart-style racing game, highly recommended for this price, especially if you have mates to play with (but it stands on it's own as a single-player game too!).

Great arcade racer. It has local 4 player, although I've only used it for two player games. Played the original on PS3 and the PC version is much nicer if you can run it at 60fps.

can someone confirm if this is a physical copy or a STEAM KEY?

Great game but the hard difficulty is damn hard. You need the skills of the Stig or Lewis Hamilton to ace the hard difficulty - which they ought to tone done.

Much preferred the original first version. What format is this for?

Very decent game and quite impressive in 4K at 60fps.
I did encounter controller issues with 3-4 play split-screen though, it couldn't detect inputs with more than 2 pads.
Tested with various Logitech, XBox One, 360 and Steam controllers.