Machina of the Planet Tree -Planet Ruler- got recently released on Steam. The game is an action JRPG about a boy named Cram who is a genius S-Rank Mechanician. Current special 15% off release price is $11.04 until August 4. For more details, check out the store page. Here's a trailer.
Official Website (JP): http://denneko.com/seijunokisin_hp/