After the "Assault on Roswell" you destroyed the Alien Virus. at least you think you did !, it seems you yourself were infected and have become a carrier of this mind altering disease and are the unwilling host bringing the virus to your place of birth Portown...
This review may contain spoilers
Assault On Roswell was a classic mod (to me), And it always will be. When Riot In Progress was made.. Many were less than happy with it. Me? It's an ok mod but it can become a hassle.
The main thing was that using Save when you don't have any of the save icons will hurt you (this has been fixed since i played it a while back)
Riot In Progress gives you a large arsenal of weapons to use against enemies, Thought there are no cheats.. It is not impossible to survive.
The mapping is very solid and it feels like a genuine Half-Life mod because of the atmosphere. At times, It may seem like it is impossible to go any further but likely you are not looking around enough.