Here are the Topple Tactics System Requirements (Minimum)
CPU: Info
CPU SPEED: 2.5 GHz Quad-core Intel or AMD processor
RAM: 4 GB
VIDEO CARD: NVIDIA GeForce GTX 470 or AMD Radeon HD 6870
DEDICATED VIDEO RAM: 1024 MB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: Windows 7 64-bit
FREE DISK SPACE: 500 MB
SOUND CARD: Any