X-Com and Half-Life
Crossovers
Twenty Years Late by A Very Thirsty Megalomaniac reviews
It's hard for the Ethereals to invade when someone else got there first.
Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 103,997 - Reviews: 48 - Favs: 102 - Follows: 111 - Updated: 6/20 - Published: 5/14/2018 - Bradford, A. Shephard, Barney C., The Combine
