It sounds like you're describing "Total War: ATTILA," which is part of the acclaimed Total War series known for combining turn-based strategy with real-time tactics. Here are the key features and system requirements for the game:

Key Features:

Apocalyptic Destruction Mechanics: Utilize the power of fire in battle to set buildings ablaze and terrify defenders. Use the new raze mechanic to wipe entire cities and regions from the campaign map.

Legendary Start Position: Play as the Western Roman Empire with vast territories under your control, but weakened by internal conflicts and surrounded by enemies. Survive and thrive in the face of overwhelming challenges.

Overhauled Game Mechanics: Experience improved core gameplay and user interface with updated Total War mechanics, including politics, family tree management, civic management, and technological progression.

Incredible Period Detail: Immerse yourself in the authentic historical setting with period-specific technologies, arms, armaments, religions, cultures, and social upheaval.

Outstanding Visual Fidelity: Enjoy enhanced campaign and battle visuals that depict a chilling vision of impending apocalypse and the collapse of civilization, with improved graphical performance and atmosphere.

System Requirements:

Minimum Requirements:

OS: Windows Vista

Processor: Intel Core 2 Duo 3 GHz

Memory: 3 GB RAM

Graphics: 512 MB NVIDIA GeForce 8800 GT, AMD Radeon HD 2900 XT, or Intel HD 4000

DirectX: Version 10

Storage: 35 GB available space

Recommended Requirements:

OS: Windows 7

Processor: 2nd Generation Intel Core i5

Memory: 4 GB RAM

Graphics: 2 GB NVIDIA GeForce GTX 560 Ti or AMD Radeon HD 5870

DirectX: Version 11

Storage: 35 GB available space

"Total War: ATTILA" offers a gripping strategy experience set during a time of apocalyptic turmoil, challenging players to survive and thrive in a world on the brink of collapse. Command armies, manage resources, and make crucial decisions to shape the fate of empires during this tumultuous period of history.