Do I need to build a "gaming" computer?

[InbetweenDreams]

I for one agree with [MENTION=19807]SilverBullet[/MENTION] about power supplies. If it is heavy enough to cause a concision you're good. All that stuff about efficiency is accurate as well. Generally speaking it is always better to go a bit higher on a power supply because if something "pops" it could take along the rest of your hardware.

Now on to hardware. All the games you mentioned will run on modest hardware, except Street Fighter V, that one is probably a bit of a hoss...probably need something like a Core i7 variant and a GTX970 for a video card. (I'm generally supportive of Intel and nVidia).

Next question is what do you currently have? It might be a simple matter of adding some RAM and a newer video card to an existing system to be able to play the games you're wanting to play with good performance.

You can build a gaming computer for $600 but it won't be one that will be "future proof." Just a rough estimate in cost can figure about $1500 (cost will vary in the end) to build a good gaming computer that you will be able to use for years. My system is about 5 years old but since it wasn't a "gaming rig" the video card is pretty well out of date. However, I could easily pop in a GTX 980 and be off and running on most all games and have good performance. So while it doesn't have the latest core i7 can still do pretty much what I need.
[MENTION=22914]Cobalt[/MENTION] do you currently have a desktop PC? You might be able to upgrade that and slowly migrate to newer hardware. That would be the most efficient way but if you're not one to tinker then that might not be the best option.