Alyx goes back to Black Mesa East to search for some lost documents, and finds her future instead. Written prior to the release of Portal 2 and so now non-canonical.
Crossover - Half-Life & Portal - Rated: K+ - English - Adventure/Sci-Fi - Chapters: 1 - Words: 28,873 - Reviews: 2 - Favs: 12 - Follows: 3 - Published: 8/3/2012 - Alyx V., GLaDOS - Complete