About This Game
Book of Aliens’ action takes place during a global crisis. Earth is threatened by an alien invasion originating from below the planet’s surface. Your mission is to lead a supranational agency of scientists and military agents in a desperate but valiant fight to understand the alien agenda and thwart it.
The game is currently in early development. The screenshots shown are from one of our in-house prototypes and they might not reflect the actual look of the final game. While we can’t reveal a lot of details just yet, you can expect:
unique gameplay mechanics that make the game simple to play yet strategically challenging and difficult to master a game that respects your time and can be enjoyed in both short and long gameplay sessions high replayability thanks to randomized levels and card-based mechanics beautiful paper pop-up book stylized graphics
Be sure to wishlist the game to be notified when it is released. 
About Return 2 Games series
Book of Aliens is the upcoming second installment in Return 2 Games, a series of unique mid-core games inspired by the golden days of PC gaming. Each R2G title is a tribute to a single hit game from the ’90s: a reimagining of a single universal story for a brand-new audience, using modern means and innovative, often vastly simplified gameplay mechanics.
Book of Aliens is developed as a tribute to MicroProse’ UFO: Enemy Unknown. If you want to learn more about Return 2 Games or support us in the development of the series, visit the Supporter Pack store page:
https://store.steampowered.com/app/706770/Return_2_Games_Supporters_Pack/
Book of Demons, the first part in the series is already here, be sure to check it out as it includes a free demo.
https://store.steampowered.com/app/449960/Book_of_Demons/
Also, be sure to check out Book of Demons: HELLCARD, a Book of Demons co-op roguelike deckbuilder that’s also in the works:
https://store.steampowered.com/app/1201540/Book_of_Demons_HELLCARD/