(500$) First time building a PC

[Schmozilla]

Approximate Purchase Date: This Month
Budget Range: 500-550$
System Usage: Lightish Gaming, L4D2, Dota 2, Killing Floor
Do you need to buy OS: Yes
Preferred Website(s) for Parts: All on one Website if possible?
Location: USA
Parts Preferences: None
Overclocking: Probably not
SLI or Crossfire: No
Your Monitor Resolution: 1280x1024
Additional Comments: First time building, Maybe some basic advice and other needed items to build a PC? Thanks in advance.

 

[jerryvaberry]

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G3258 3.2GHz Dual-Core Processor ($69.99 @ Amazon)
Motherboard: ASRock H81M-HDS Micro ATX LGA1150 Motherboard ($54.99 @ Mwave)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($72.00 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($54.99 @ Amazon)
Video Card: MSI Radeon R7 260 1GB Video Card ($99.99 @ Amazon)
Case: Rosewill FBM-01 MicroATX Mini Tower Case ($29.74 @ Amazon)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($54.99 @ NCIX US)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.99 @ NCIX US)
Total: $526.68
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-11 16:01 EDT-0400

Nothing great, but nothing at that budget is...and it will play all of the games you have listed pretty well. And this is an overclockable cpu, and you should utilize it if you choose to go with it. You may find that you need an aftermarket cpu cooler to keep temps down. The 212 evo is cheap will suffice.