The sounds were taken from lbreakout2 and gl-117 which both are GPL licensed
and thus may be distributed under the GNU GPL (see COPYING):

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[crack-attack-devel] Hello, it's me.

Miguel Angel Vilela
Wed, 08 Feb 2006 21:23:00 -0800

Hello, I am miguev.

Thanks a lot :-)

I wrote that patch for music and sound effects two and a half year ago,
when I was too addicted to Crack Attack so I wanted for play with sound
and couldn't wait anymore. But I wrote this code before learning C++
(I only had learnt C), so I'm afraid it was quite buggy.

Nowadays I'm not addicted, but in risk of return to be.
Got only 709 y normal mode. Don't dare to play X mode.

However, I got very happy when noticing you have continued my little work
and this is --partially-- why I'm very thankful to you.

I borrowed the sounds from gl-117 (most of them) and from lbreakout2.
The music I use is the Unreal Tournament 2003 BSO, but I'm afraid it's not
freely distribuible. That's why music use to be in ~/.crack-attack/music/

BTW, my name is miguev, not Miguev (which already belongs to a character).

I think I will hardly be able to collaborate with Crack Attack just now,
but I'd like to try whenever I got the time.

Best regards,

Miguel Ángel Vilela
-- miguev.net

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The music files were taken from crystal-stacker by Todd Cope, and thus fall
under the following license:

---

Crystal Stacker is freeware. This means you can pass copies around
freely provided you include this document in it's original form in your
distribution. Please see the "Contacting Us" section of this document if
you need to contact us for any reason.

---

And for completeness the "Contacting Us" section:

---

Contacting Us
-------------

If you have general questions about our programs or anything else you can
contact us via e-mail. Please report any bugs you find in our software as well.
Visit our web sites for the latest updates and releases.


E-mail Address
--------------

todd@t3-i.com


Web Address
-----------

http://www.t3-i.com
