The landscape of PC gaming is littered with bright ideas and good intentions: both of those things seem true of 0 A.D. Wildfire Games have take the popular template of Age Of Empires-style historical RTS, and made an open-source project out of it. You can see the fruit of their labours in a series of videos – linked below – or, hell, you can download the alpha and play it (Windows, OSX, Linux). Wildfire are so keen on getting people involved to create mods and variants – or to help with the main game – that they’ve even gone and posted a how-to guide on how to engage with their programming plans. Commendable.
Listen to that guy’s voice! Sexy.