Minimum:

OS: x86/x64 versions of Microsoft Windows 7 (SP1 with latest updates), 8.1 and 10.
Processor: AMD Dual-Core running at 2.6 GHz / Intel Dual-Core processor running at ~1.9 GHz (AMD Athlon 64 X2 5200+ and Intel Core 2 Duo E6300 or newer series are the oldest CPU architectures recommended).
Memory: 4096 MB RAM
Graphics: AMD/NVIDIA dedicated/integrated or mobile graphic card, Intel integrated or mobile graphic card, with at least 512MB of dedicated VRAM AMD Radeon HD 3450, NVIDIA GeForce 9600 GT and Intel HD Graphics (Sandy Bridge) and above are minimum required graphic cards.
DirectX: Version 10
Storage: 1 GB available space
Sound Card: Integrated or dedicated DirectX 9.0c compatible soundcard.
Additional Notes: Keyboard, mouse

Renowned Explorers: International Society screenshots