Blade Symphony now has 70% off in the Humble Bundle Store's Spring Sale.
https://www.humblebundle.com/store
For the next 48 hours it can be purchased for the super low price of: $2.99/€2.99/£1.99
10% of every sale is donated to charity.
You get Blade Symphony at a steal and you also get to support charity at the same time!
https://www.humblebundle.com/store/p/bladesymphony_storefront