As with Rockin' Android, Curious Factory specializes in bringing doujin games -- titles created by hobbyist developers in Japan, like Cave Story -- to U.S. audiences. The company also provides services for releasing English games in Japan, offering text and voice localization, Japanese gaming and entertainment PR solutions, and distribution through six Japanese on-demand sites.

The publisher has already released one doujin PC game in North America, Supercharged Robot Vulkaiser (see video above), through Direct2Drive and its own site, the latter of which offers a free demo.

Developed by Astro Port, the horizontal-scrolling shoot'em-up has players taking control of flying robot Vulkaiser in a tokusatsu superhero-styled battle against the "Gogoh military group from outer space".

Curious Factory has two other shmups from Astro Port planned for release, Witch-bot Meglilo and Armed Seven, both with trials available for download:

Witch-bot Meglilo:

"Using 'tokimeki warp', a magic to stop the time and warp the space, shoot the enemy! This is a magical girl shooting game with lots of lightly melancholic drama! In the bonus dress-up feature, every time you beat stage 2 and stage 4 on each difficulty level, you will get a dress up roulette where you can get a new part for Meglilo. When you beat stage 6, the final stage, you will get two parts for her."

Armed Seven (I'm pretty sure this takes place in the Supercharged Robot Vulkaiser universe):

"In 1989, already 12 years have passed since the invasion of Gogoh military group. Due to the introduction of the alien culture, the technologies on the earth have progressed immensely. The conflicts between the countries were diminished. The earth federation was established as the earth unification government. People are about to enter into the era of unprecedented prosperity in history.

However, the peace was abruptly broken. The armed secret organization, Neo Roland party, was planning on controlling the earth society. They managed to exploit the weapons from the federation, and began a massive assault on the entire world. Now, the newly formed earth federation began fighting back to save all the human lives!"

Curious Factory is also working to release Ultimate Knight Windom XP, a 3D robot action game featuring 17 different mechs and online battles for up to 10 players: