The original Games of Gondor site has its earliest recoverable archives dating back to 2004. GoG was mainly focused around Lord of the Rings themed flash games and movies.
Armor Games was born in September or October 2005 when the site was threatened (probably by the Tolkien Estate) as Graham said. Armor Games slowly evolved until its first major overhaul. AG 2.0 (this AG) went live in January 2008.
Now we'll be seeing AG 3.0 sometime. Parts of it are already evident in the AGI.
If you want to find some old GoG games you can go around searching for "Games of Gondor". Elf Girl Sim Date RPG is one of the more memorable old games froom GoG. If you want to look at the old AG, this will help. Just enter "armorgames.com" and "gamesofgondor.com" in the search bar.