Hello there! It's great to hear that you're feeling nostalgic for CrossFire Offline Version and the Challenge Mode. While the official CrossFire Offline Version may not have the Challenge Mode available, there are some unofficial versions or private servers created by fans that might offer the features you're looking for.
Be cautious when downloading unofficial versions or private servers, as they may not be safe or legal to use. Make sure to do thorough research and be mindful of the risks involved in using such versions.
If you have any specific questions or need guidance on where to find these unofficial versions, feel free to ask. Nostalgia can be a powerful feeling, and it's always nice to revisit old memories through games like CrossFire.
