I'm not dumb enough to hate non-linear level design, but this campaign is so open that it always took me some time to find the correct path, which is not very fun. Other aspects seem to be OK, at least in the oldest days, but they still feel kind of rough in some ways. BotNAV issues, shortcuts, jesus spots also exist, and can be found without deep searching. Btw the author forgot to use the soundscripts he created.
Review
Edited: 18 hours ago