[ioquake3] Urban Terror moves to a license of quake3

[Michael Menegakis]

On Thu, Nov 4, 2010 at 7:24 AM, Russell Valentine
<russ at coldstonelabs.org> wrote:
> If you read the comments of the announcement, you'll see that since
> their mod is not GPL they had to keep it compatible with vanilla so they
> could "imagine" it is for the original vanilla engine even if people
> used ioq3 to play it.

That may explain the wording in that part which had me confused and
asked in their forums: GPL doesn't disallow them being incompatible,
it doesn't solve that problem, what problem does it solve (and are
potential fees to play it involved)? It probably solves the problem
that when they asked for legal information (they had said they had
contacted id software for such legal matters and got an ok), the
answer was probably 'as soon as it remains backwards compatible'. It's
still a very confusing concept since it's not impossible to have both
an incompatible with baseq3 client, and a compatible one, though
complexity may increase in case they would need to keep backwards
compatibility in their game base.