Shovel Knight [official site] is a fine game, drawing influence from many 8-bit games into a smart, slick, and unique fight-o-platformer which rises above plain old nostalgia. (Read what Cobbo said about it.) It's about to get bigger and better, thanks to a free expansion which developers Yacht Club Games say really is "coming soon" for real this time. They've made a trailer and everything to show how much they mean it.
Plague of Shadows stars Plague Knight, a boss from the original campaign. He'll be taking on his former allies in the Order of No Quarter, rocking around with his chemical powers. He takes a slightly different path through the game, facing new enemies and bosses too.
The expansion will also add equipment and power-up crafting through an alchemy system, along with a Challenge Mode setting tasks like speed runs and puzzles.
Plague of Shadows rolls together several stretch goals from Shovel Knight's wildly successful Kickstarter campaign in 2013. Looking for $75,000, Yacht Club Games ended up with $311,502. They had planned to release the expansion before the end of this June, but, well, they didn't. They now say it's "coming soon." It'll be free to everyone who owns the game - thanks, Kickstarter backers!