The map ac_desert is one of the four maps of AC 0.90, the oldest known version of AC.
The supported game modes depend on the version. The version found in ACR 2.5.9 contains both CTF flags and secure flags. The version found in ACR 2.6 have no flags.
The map have two bases. The teamplay payerstarts are in these bases and near from them. The red base is at the southeast of the map and the blue base at the northwest.