Pre-retail vanilla in late-2006, can't remember specifically but I think it was just a freebuild. Server list was pretty sparse at this point since (unbeknownst to me) mostly everyone had already migrated to RTB 1.045, and this was probably the only vanilla server at that time that actually had any amount of players in it. I remember there was a tower that someone had built from the outside of the window up to the roof (this was on the bedroom map) which looked kind of like an elevator shaft. I ended up talking with one of the few (two?) people on this server by the tower about how I had trouble finding active servers and they told me about RTB and how practically everyone abandoned vanilla for it. I of course immediately followed suit and dropped vanilla for it, never to come back. I wonder why the people in that server were still playing vanilla even when they were aware of RTB?