MINERVA is not a single modification, but will be an ongoing series of single-player Half-Life 2 maps. The first map, Metastasis, is currently under development by Adam Foster, and (as of the beginning of July 2005) is nearing completion - with architecture almost completely done, and entity work and game-play approximately 33% complete. Its development involved the learning of Half-Life 2 mapping techniques, so subsequent releases should occur much more quickly.