counter-strike-global-offensive
I forgot to download a demo of a match on de_cache that I did really well in, now I've played enough matches that it's not in the "Your Matches" tab anymore:
As you can see, there's not an arrow to view matches before either. Is there a way to get that demo or is that match lost in the abyss?
The accepted answer is out of date, here is the current way to do it:
The demo will be now downloaded.
The nav file is likely embedded into the map file using BSPZip or PakRat.
This isn't common for Valve's other games, as nav files can be edited in game and embedding it in the map prevents that. However, workshop restrictions may mean we'll see more of this kind of embedding for CS:GO (and as of August 2015, TF2)
Best Answer
By my guesstimation that demo is gone forever. The Recent Matches tab displays demoes stored on a cloud, and most probably they are simply popped/deleted from the list as it overflows - Would be costly to allow an unlimited amount of storage space per user.
Your best bet would be to contact valve. I had no luck figuring out what they system entailed through google.
EDIT: It would seem that the .dem files might be time-based stored, not just popped when > num. Read more: How can I get a match demo that I can't download?
Might be that they do both! But if it's time-based, it could be possible if you contact valve that it is still in their systems and that they could give it to you.