Robotics;Notes is the third visual novel from 5pb's 'science fiction' series, which began with Chaos;Head and continued with the time-travel adventure Steins;Gate.
Penchant for semi-colons aside, 5pb are vets in the VN genre, and this one tries a few new things.
3D models instead of portraits, for one.
Robotics;Notes tells the story of a high-school robotics club. The protagonist is an ambitious mecha fan who dreams of making a robot that can rival the mech of his dreams from his favorite anime.
This eventually leads to question of ethics involved in making real-life giant robots, and the potentially disastrous outcomes.
The demo is quite meaty, taking a good 2-3 hours to complete,possibly much more depending on your reading speed. Since the odds of this receiving a localization are slim to none, it's worth a look if nothing else. It can easily be found from the main page.
As an aside: Tokyo Jungle looks amazing, and the US release will be truly something to look forward to.
Update: here's the opening.
The game is also on the 360, but access to the demo requires a Japanese XBL Gold account, sadly.