Well, for one thing, you've just solved one of the greatest mysteries related to Keen lore.

Second, this appears to be a clone of WinTrek - or maybe WinTrek is a clone of this, I dunno. There's actually several games with this same game mode... enough to warrant a MobyGames group. So who knows.

I googled a bit and found this post from Tweak3d which mentions a guy that found out the same things you did, more or less.

Also those names in the bootup screen are definitely not Brazilian.