Maps & Settings about the H3A playlist on Halo 5: https://www.halowaypoint.com/en-us/news/happy-birthday-halo-3
Maps:
LOADOUTS
Spartans will take to the battlefield with a Halo 5 BR w/ Classic Scope as the primary weapon and an Assault Rifle in the secondary slot.
PLAYER SETTINGS
In order to help convey a more classic gameplay feel, the team has adjusted a numbers of settings to make Halo 5 play a bit more like Halo 3 did. Eric "GH057ayame" Hewitt, a designer on Sierra Team who just recently departed 343 to pursue new opportunities, led this effort by combing through the sandbox settings and code for Halo 3, working closely with former Pro Team members, and evaluating several common community-driven "evolved" settings.
Here's the breakdown of the gameplay settings changes that are unique to this playlist:
Motion Tracker range is increased to 25m
All Spartan Abilities are disabled (Sprint, Ground Pound, Spartan Charge, Stabilize, and Clamber)
Player jump height is increased
Slightly increased the effect of gravity on players
Player movement speed decreased
Increased player forward and strafe acceleration
Adjusted shield and health recharge rate to approximate Halo 3 values
Classic Team Oddball: Reduced ball carrier movement speed
Classic Multi-Flag CTF: Reduced flag carrier movement speed
Maps:
Guardian
Snowbound
The Pit
Citadel
Isolation
High Ground
Ghost Town