The ability to fully program the keyboard and mouse to your own preferred settings is excellent as is the 'reset to defaults' option if you really blow it. Movement is intuitive and accomplishing normal tasks is easy . It wasn't 'bad, I just have a different taste I guess. As with the Quake2 I really wish they had done something better for the 'jump sound'. Artificial intelligence in this game does not appear to have improved over the original.
Enemies still do stupid things, but they still are challenging.
The real beauty of Quake 2 and The Reckoning is multiplayer replayability. Single player replayability is there, you can turn up the difficulty, but once you know the puzzles, it'll be a lot less fun. Gameplay in The Reckoning is an all out blast once you get past the first couple of levels which are in my opinion slow. The manual gives you all the salient facts that you need but is still just a jewel case insert. Although this game had a couple of dull levels I believe that the addition of cooperative play, the new weapons, and the great design of later levels brings it so close to Quake2 that I can not see giving it less than a nine.