Jump straight into combat in this official standalone FREE total conversion of Arma 3. Argo is a hardcore tactical first-person shooter, in which you fight across unrestricted terrain, and where a single bullet is all it takes. Master your craft to rank up and become (in)famous on the battlefield.

Wikipedia

System Requirements

OS: Windows 7 SP1 / 8 / 10 (64bit)
Processor: Intel Core i5-4460 or AMD FX 4300 or better
Memory: 6 GB RAM
Graphics: NVIDIA GeForce GTX 660 / AMD Radeon HD 7800 Series with 2 GB VRAM
DirectX: Version 11
Network: Broadband Internet connection
Storage: 20 GB available space
Sound Card: DirectX®-compatible soundcard

Minimum

OS: Windows 7 SP1 / 8 / 10 (64bit)
Processor: Intel Dual-Core 2.4 GHz or AMD Dual-Core Athlon 2.5 GHz
Memory: 4 GB RAM
Graphics: NVIDIA GeForce 9800GT / AMD Radeon HD 5670 / Intel HD Graphics 4000 with 512 MB VRAM
DirectX: Version 10
Network: Broadband Internet connection
Storage: 20 GB available space
Sound Card: DirectX®-compatible on-board