A brother of mine wanted a laptop for very simple tasks such as streaming and lite gaming. So knowing that he was a hardcore console gamer, I suggested I made him a tiny PC with more horsepower than what he originally asked for. So we ended up putting together a parts list of a tiny cube capable of playing AAA games with high to ultra settings with stable frames on a 1080p@60Hz display. This case is best used with 1 SSD + 1 HDD configuration. It cannot accommodate more hard drives if you plan to add a discrete GPU to it. So if you needed more space you either go with a 4 or 3 TB drive from the start or add an external storage later.
My main element in putting together the part list was the case. My brother immediately when he saw said he wanted no other case so that's the main reason why I picked it. I selected this CPU because of the reasonable price range and it's strong enough to run games like GTA V with nice optimal visuals. I went intel because it's an energy saver and wouldn't rise the number of watts needed on the PSU. No overclocking is ever planned so no aftermarket cooler is needed for now. And since I'm not overclocking I seleted an H97 mobo to cut a few dollars from the cost while maintaining some functionality like integrated graphics support (as backup measures) and built-in wifi (which isn't quite built-in since it has to eat it's share of the CPU's PCI lanes as it seems). Memory at purchase time was the cheapest 2x4GB-1600-1.5V-CL9 pair that's low profile and allows for adding an HSF cooler in the future. GPU was the best option at the time of the purchase plus it came with a free Witcher 3 redeem code. It fits this case just fine and runs nearly quite. SSD isn't known to lose it's speed over time after the data become old and it I was told that it maintains the benchmarks promised to us by reviewers so I went with it. HDD was available in a store nearby and I didn't think much at the time but later discovered it had only 32MB cache so a blue would be better. PSU has enough watts for the build and being able to discard a couple of cables from such a tight case was a plus so the semi-modular choice was worth it.
This setup is ideal for demanding games that support controllers. Games like platformers, sports, racing and fighting games are suitable for any similar setup. Skyrim and Dark Souls are great too. I wouldn't recommend this kind of setup to people who want to play RTS or online competitive shooters as kb+m become mandatory in that case.