Game description: Half-Life 2: Citadel Storm:
You play as Gordon Freeman. After you cleared the city from the invaders you set out to Citadel to destroy the portal. Alliance soldiers enter our world through this portal. Go through all Citadel labyrinths shooting your enemies.
This mod offers excellent HD graphics, textures + HUD and other 2d elements + new dynamic soundtrack which will plunge you into Half-Life 2 atmosphere.