I didn't "forget" it, I never meant to mention every attempt at episodic gaming.
However, I do think that Grimm is definitely an interesting step in the right direction. I've been having fun with the series, even with the...er, nonexistent difficulty. Though I think their philosophy was to make true difficulty come from doing speed runs, while also making the game fun and quick to run through. And it does work, I have fun playing it.
And the price of $4 an episode would definitely be reasonable if I didn't have Gametap already. The $28 season price is definitely reasonable for what is offered, and I think this is a model I can support. Especially with the free first episode.
I wish it was advertised that the episodes can be bought on their own, and I wish there was a "Season Pass" option other than subscribing to Gametap. But I definitely like the way Grimm is going.