This release has new and custom weapons, and autonomous co-op AI!
Some of the new weapons are shown in previous posts, and co-op AI is now able to help you complete mission objectives, as well as being a bit smarter than before.
C-Dogs SDL now supports custom weapons, defined as JSON files and loading per-campaign custom data. Take a look at missions/techdemo/funwithguns.cdogscpn
for an example. Later I will document the file formats, and possibly provide a weapon editor - just nag me if you want it!
Downloads: https://sourceforge.net/projects/c-dogs-sdl/files/
Full release notes: https://github.com/cxong/cdogs-sdl/releases/tag/0.5.6