The article was produced after hands-on play with Halo: Combat Evolved Anniversary. The multiplayer build running was the original Halo CE multiplayer experience but with a new engine. The article clearly states this and also goes on to say about the Reach Multiplayer making an appearance in the package as well but likely as a separate entity.
There is a multiplayer component to Halo Anniversary beyond the Reach multiplayer. I know, I played it.
No it wasn't. I think you're thinking of Worms Revolution, mate.