Sonic the Hedgehog's dalliance with episodic gaming seems to have been a bit of a dud, with Sega revealing that after Episode 2 ships the publisher has no plans for more episodes.
In an interview with Digital Spy, Sonic Team boss Takashi Iizuka said "We are looking forward to hearing the feedback from the users for Episode 2, but we are currently not planning to release another episode".
Two things. One, this may be an elaborate Half-Life joke, because two instalments doesn't count as episodic. It counts as one game, then that game's sequel.
And two, remember, "no plans" is about the worst PR statement in the video game business. It means almost nothing. So don't entirely count out the possibility of there being more of these.
'Sonic 4: Episode 2' interview: Sonic Team on a fan-pleasing sequel [Digital Spy]