http://www.angelfire.com/dbz/SErviceGAmes/HalfLife2.jpg
https://web.archive.org/web/20070821101540/http://www.sharkyextreme.com:80/features/article.php/2210031
https://static.giantbomb.com/uploads/original/0/1992/1073609-counterstrike_cz.jpg
http://phoenixgenesis.com/guide/site-index.html - e3 2003 image 41
https://www.gamespot.com/articles/the-final-hours-of-half-life-2/1100-6112889/
http://colinfahey.com/e3_2003/e3_2003.html
https://www.hl-inside.ru/comments/?1053003121
https://web.archive.org/web/20031219180311/http://www.gamemarshal.com:80/gamecenter/preview.php?&id=49