Pádraic Brady, developer of the (work in progress) PHP-based strategy game Astrum Futura has posted today with the results of his look at a ranking of current PHP-based games and their popularity.
Sometimes I find it useful when measuring what's being downloaded in terms of open source PHP games to look at the top 10 rankings on Sourceforge for each gaming category. I say sometimes, because it tends to be fairly unreliable and doesn't really reflect real usage online.
Games on his list include Solar Imperium, Alien Assault Traders, PHP RISK and number one on the list - phpDiplomacy. Each item on the list includes the Sourceforge ranking against all other projects.