You've found the web presence of undecidedgames.net. This page is mainly used for info about the CounterStrike: Source server that is occasionally hosted at this address. Please add undecidedgames.net to your CounterStrike: Source favorite servers (the second tab of the Find Servers window) and feel free to join any time you see the server is up. In the absence of a suitable number of human players, bots carrying only pistols are added. This happens a lot.
The server here may run custom maps. Those map files are hosted here. Simply click below to download. Be patient, as my uplink is slow. Try the GameBanana links if you want faster service.
Note that if you have your game configured to allow all media from the server, the maps will be downloaded automatically when you connect.
Custom maps: