What has a bear, a beard, two-legged mechs, and flies? Iron Brigade: Rise of the Martian Bear.
Last year, I praised and criticized Double Fine's Trenched before it received a new name. My verdict? It played and worked well, but didn't offer enough variety and versatility to last as long as a proper tower defense game should. Fortunately, Rise of the Martian Bear provides a lot of content, weapons, and towers that resolve many of the issues the original Iron Brigade faced.