I gave you a 960 because not only is it above the 380 in benchmarks, but your most demanding game, Witcher 3, is optimized for Nvidia. If you were to stretch your budget to $900 you would have a nicer looking pc but this build will run all your games at a steady 60FPS.
PCPartPicker part list / Price breakdown by merchant
| Type | Item | Price |
|---|---|---|
| CPU | Intel Core i5-4460 3.2GHz Quad-Core Processor | $239.15 @ Vuugo |
| Motherboard | MSI H81M-P33 Micro ATX LGA1150 Motherboard | $59.15 @ Vuugo |
| Memory | Crucial 8GB (1 x 8GB) DDR3-1600 Memory | $45.48 @ DirectCanada |
| Storage | Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive | $59.15 @ Vuugo |
| Video Card | Gigabyte GeForce GTX 960 4GB Video Card | $279.99 @ NCIX |
| Case | Rosewill FBM-02 MicroATX Mini Tower Case | $44.98 @ Newegg Canada |
| Power Supply | Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply | $65.99 @ NCIX |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total (before mail-in rebates) | $833.89 | |
| Mail-in rebates | -$40.00 | |
| Total | $793.89 | |
| Generated by PCPartPicker 2015-12-21 14:05 EST-0500 |