Darn too late :(
There'll be more code for other games in a few hours, don't worry! Whenever I find out that Humble Bundle updated the list I'll bump the thread.
You should check out my YouTube channel, The Golden Bolt! I review all types of video games, both classic and modern, and I also give short flyover reviews of the free games each month on PlayStation Plus to tell you if they're worth downloading. After all, the games may be free, but your time is valuable!