Reach by a mile. Halo 4 is far less graphically consistent and has rampant ugly textures pop ins and low res textures. Reach is a far better looking game. Although post TU reach is worse then Pre TU Reach, it is still better then the fast paced ADHD game that is Halo 4. Reach's campaign crushes Halo 4's in every way. Halo 4 was a repetitive shooting gallery while Reach was constantly mixing the gameplay up with excellent pacing and vehicle variety. Halo 4's script feels like a 15 year old wrote it as well, not to mention the horrible job 343i did introducing the Didact to people who are unfamiliar with Halo's lore. Then of course, forge and customs are beyond comparison between the two, Reach has a much better forge and customs suite. Firefight in Reach is excellent, especially with 4 friends, but i will say the lag in matchmaking leaves something left to be desired. Then of course Halo 4's biggest embarrassment, Spartan ops. Not even worth anyones time describing. Horrible story, horrible mission design, repetitive missions, zero variety, pathetic paper thin characters, recycled levels, and a rushed project overall. Reach was an excellent sendoff for bungie and is criminally underrated. Halo 4 is a disappointing fart to 343i taking over the franchise