The latest Humble Bundle is all about the art of war. If you've ever been interested in Creative Assembly's long-running Total War series, now seems like a pretty good time to grab them and support a good cause at the same time.
Paying what you want gets you access to Medieval 2: Total War Collection, Shogun: Total War Collection and hack 'n' slash RPG Viking: Battle for Asgard. You also get some soundtracks, eBooks and other bits.
If you pay more than the average of $8.35 you also get Medieval: Total War Collection, Empire: Total War Collection and Total War: Arena - along with 18,000 of in-game gold, worth $10.
Total War: Rome 2 Emperor Edition and all its expansions are thrown in if you cough up $15 or more. On its own that game is £29.99 on UK Steam, so it's a lot of war for your wedge. Here's the promo trailer: