Here is a full good PC for that low games you want
CPU: http://www.plaisio.gr/Computers/Hardware/CPU/Intel-Core-i3-560-s1156-3-33GHz-4MB-BX80616I3560.htm
Motherboard: http://www.plaisio.gr/Computers/Hardware/Motherboards/Turbo-X-H55MXV-s1156-DDR3-H55-H55MXV.htm
HDD: http://www.plaisio.gr/Computers/Hardware/Hard-Disk-Drives/SEAGATE-SATA-II-1-5TB-32MB-7200-11-ST31500341AS.htm
RAM: http://www.plaisio.gr/Computers/Hardware/RAM/Corsair-4Gb-Kit-Ram-Ddr3-1333-Tw3X4G1333C9A-TW3X4G1333C9A-G.htm
Optican Drive: http://www.plaisio.gr/Computers/Hardware/Optical-Disc-Drives/Samsung-DVD-RW-SH-222AB-Sata-Black-Bulk-SH-222AB.htm
Case: http://www.plaisio.gr/Computers/Hardware/PC-Cases/Fazn-A18-Piano-Black-Midi-A1008-A1008.htm
Power: http://www.plaisio.gr/Computers/Hardware/PSU/CoolerMaster-GX450W-450W-RS450-ACAAD3-EU.htm
345€ + you will put windows and rdy