In Verbis Virtus, by Indomitus Games, is an unique, interesting, and beautiful first-person puzzle and exploration game that uses your voice as the catalyst for spell casting. It is currently in early access on Steam, and is available there for £12.99.

Steam Link: http://store.steampowered.com/app/242840/

Twitter: @Iyagovos
Website: http://www.initiativecheck.com