Yeah, you need to seriously calm down.
I don’t doubt that you may have a problem system but you should probably research all your facts out first before you start going post crazy. Additionally, if you can logically and calmly communicate your problems to the original vendor then you have a far better chance of getting it resolved.
Hylton is absolutely correct in saying that XP (like Windows 2000) is based on the Windows NT Kernel. For your information, Windows 2000 is technically Windows NT 5.0 and Windows XP is Windows NT 5.1 internally at Microsoft. Some games designed for Windows 98SE/ME won’t run on NT-based systems.
First, you need to examine what the games are. What are the games? What are the requirements for each game? Make sure you have all your details straight before you complain to a company otherwise they’ll be more likely to help you and more expediently.