In a day of many failed multi-million dollar initiatives, gameplay has been replaced by high-end graphics and low barrier for entry. It still amazes me that a game like X-Com: UFO Defense can hold me rapt for longer than any Call of Duty or even Civilization. Still one of the best games ever made with no real challengers for sheer enjoyment with its creepy sound effects, tactical battle simulation and world building, X-Com can suck you in like a comfort food.

If you've never played it, pick it up now. It's available on Steam or even on many Abandonware sites.