At this precise moment, it is currently unknown. Halo CE Anniversary will, however, use the original halo's campaign levels, but will use the multiplayer system and indeed servers from Halo: Reach.
Halo: Combat Evolved 10th Anniversary Edition is already out (year 2011). The original Halo: Combat Evolved was released in 2001.
No.
No
It is not any harder. Check and see if you had any skulls on while playing. If not then it might be that Combat evolved plays differently than the newer games
yes
Buy it at best buy.
8
back button
I really do not know
1.
It is not out yet, but will be out on November 15th this year.
Bungie.net