"Halo 4 manages to shows its age!" —
With 343 Industries still providing us a video game (and not a techno-movie), the game plays out in a long slog against legions of enemies. Wash-rinse-repeat, wash-rinse-repeat. Add cut scenes for good measure, and you have the incredibly annoying pleasure of spending most of your time in lush set pieces instead of playing a consistently developing game.
The game isn't out to stump anyone, and fails in parts to challenge with its puzzle. 343 Industries could have continued to adapt the game for a new audience by adding more functions for them to enjoy. Customizable trinkets like gun upon gun, or armor configuration leaves "Halo 4" simple in its execution and relatively untouched from previous incarnations.
While this doesn't get so bad as other FPS franchises ("Call of Duty: Modern Warfare 3," anyone!?!), "Halo 4" could stand to learn a thing or two about story pacing. The overall storyline of the "Chief and Cortana" against the galaxies saga has become so rich due to the novels, comic books and other adaptations that following along with the lore has become a chore within itself.
You may not be able to follow the story without logging onto the Halo Wiki or being an avid fan, and that's enough to turn certain people off.