German developer FIN arts has released a playable demo of Bacteria, their 3D shooter inspired by movies like Fantastic Voyage and Innerspace where you pilot a miniaturized vehicle injected in a human body. The site requires Flash but you can find the 54.1 MB demo on this Net-Games page. If you're having trouble accessing the download server, then a US-based mirror is available at 3D Gamers. Update: The original demo included content that publisher Net-Games "didn't mean to give away," but it has now been replaced with a trimmed 46.8 MB demo that also fixes a show-stopper bug.