Sales categories aside, porting a game like 'XCOM' to a tablet actually makes perfect sense, simply because the isometric viewpoint of a strategy game suits the board game-y feel of an iPad. 'Smartphones and tablets are not specialist games devices and as such are used to consume a wide variety of content and services so it makes sense that the nature of games - and the business models used to monetize them - differ from what is common on console.' 'It is important to remember that mobile games cater to a different audience than consoles,' Jack Kent, a mobile analyst at IHS global insights, told NBC News. So why, of all games, choose 'XCOM' as your entry into a market where customers expect ' Plants vs. And while the 2012 remake was critically acclaimed, it never achieved the popular appeal of other 2K console games like ' BioShock Infinite.' A turn-based strategy game that pits humans against aliens, 'XCOM' is so difficult it can scare away the uninitiated. That's exactly what 2K Games is trying to do with 'XCOM: Enemy Unknown,' a title that's synonymous with the hardest of hardcore gaming.

But as bigger and bigger publishers flock to the emerging market, many gamers and developers who'd rather play 'World of Warcraft' for 10 hours than 'Candy Crush Saga' for 10 minutes are still hoping that some knight in shining armor will come in to save them from a dystopian future where the only games being made are different proprietary versions of 'FarmVille.' Recently, the runaway success of flinging birds at cartoon pigs has attracted game industry heavyweights like Activision and Electronic Arts to the mobile playing field as well.

If you've ever played a game on your smartphone, it was probably something like like 'Angry Birds' or 'Temple Run' - seemingly simple apps that can be enjoyed in short spurts.

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