Counter Strike Source
The DE Gambaru is a counter-strike source bomb diffusal map set in a Japanese suburb and castle grounds.
A nice little map made by WaNNaBe_ABBA
de_nuke by Nordlichtclan
Desert Urban map, with an gas station / oil refinery in the back and a chapel next to the market place.
Hangcastle_s is a spooky themed, bomb/defuse map for CS: Source. It contains indoor and outdoor environments using custom textures. Recommended for up to 64 players.
Grim is a bomb/defuse map for CS: Source. A jungle complex under attack from Terrorist forces.
A cool little map by Anda02. There's a central building in the map and the hostages are on the top of the building. Unfortunately for you, you have to get past the terrorist spawn point to get to the hostages.
Tracy Island is a top secret island base from which the Tracy family run International Rescue. The island houses the control centre from which Jeff Tracy oversees the entire IR operation.
The map layout is fairly simple and compact with one main area and 2 alternative routes.