I personally liked it, to the point that I can give you 8 out of 10; the main problem was, at that time, either skirmish and network modes that were so under-developed leading to constant lag - although all SP-campaign missions are 'as smooth as baby's bottom'...
What cd key?
CPU: Pentium 4/Athlon XP or better
CPU SPEED: 2 GHz
RAM: 512 MB
OS: Windows 2000/XP
VIDEO CARD: 128MB NVIDIA GeForce 4 Ti or Radeon 9500
DIRECTX VERSION: 9.0c
SOUND CARD: Yes
FREE DISK SPACE: 3 GB
CD-ROM: 4X Speed CD/DVD-ROM
CPU: Pentium 4/Athlon XP or better
CPU SPEED: 3 GHz
RAM: 1 GB
OS: Windows 2000/XP
VIDEO CARD: 256MB GeForce 6800 GT or better
DIRECTX VERSION: 9.0c
SOUND CARD: Yes
FREE DISK SPACE: 3 GB
CD-ROM: 24X Speed CD/DVD-ROM
Source: systemrequirementslab'com
Basically, you were given a campaign and a handful of 'replenishable' squad of infantry, tanks, and aircraft with a largely few credits. Brute force is not always on options [unlike what 'https://igg-games.com/planetary-annihilation-496617713-titans-free-download.html' always does] as terrain and weather can be your double-edge sword too, and finally combine that with various logistics [ammo supply, technical maintenance, elevation, and rank systems] - basically, an RTS-management game, something similar 'https://igg-games.com/company-of-heroes-2-master-collection-409748627-free-download.html' [although I have yet to play CoH 2 myself, based from mostly YouTube videos]...