Wolfire Games and Unknown Worlds Entertainment have put together an unusual preorder bundle for Overgrowth and Natural Selection 2, offering a bundle of both of these independently developed games at a 40% discount for the next week. This page is dedicated to the bundle, and offers a YouTube video on the topic. Word is: "What makes this bundle so awesome is that unlike other 'indie' bundles which are hosted by corporate middle men, we are actually putting this promotion on by ourselves, so all sales will directly support our game development. We both practice 'open development' which means that preordering gets you immediate access to early builds of our games and tech. Since we're building our own engines from scratch and bundling them with editor suites, people are already able to start building their own custom levels (and have already been doing so!)." If you have already purchased either game, don't despair, as word is: "If people already pre-ordered NS2, they can still get a free copy of Overgrowth here. If they pre-ordered Overgrowth, they can get a free copy of NS2 Special Edition here."