Halo: The Master Chief Collection is a remake of Halo 2's Coagulation, boasting improved graphics, new vehicles and a pair of EMPs that will stop Warthogs in their tracks.
Xbox Wire describes Bloodline as "like a "Best Of" collection for all the iterations of Blood Gulch," but notes a few key additions that weren't seen in prior Blood Gulch homages. In Bloodline, Hornet attack ships spawn behind both red and blue bases, the map features a new, neutral base stocked with weapons and vehicles at its midpoint and if you find your base being overrun by Banshees and Warthogs, you can shut down all of your mechanized attackers at once with an EMP burst. And, of course, the map includes all of the rocket launchers, sniper rifles and explosive pink shard cannons players have come to expect from Halo.
Beyond the break you'll find a video highlighting Bloodline's multiplayer gameplay. If you've ever squeezed off a few rounds in any iteration of Blood Gulch, it should seem immediately familiar.