It looks like the site is banned in search engines.
Google output on "make games with pascal" contains very old and irrelevant sites but there is not pascalgamedevelopment.com.
The only search query on which Google gives a link to the site is "pascal game development" which means that the site is not banned.

Usually 5+ years old sites with good content are in top 10 on relevant search queries.

Seems that the phpBB itself or with certain configuration is extremely unfriendly to search engines.