http://www.ign.com/a....aled-ign-first
- Team Halo 2: Anniversary
Play a mix of Team Slayer and objective game types on re-mastered maps. 4v4. - Halo 2: Anniversary Rumble
Challenge seven other opponents on re-mastered maps. This is your fight and yours alone. 8-player Free-For-All. - Team Halo 2: Anniversary Social
Play with a team in unranked Team Slayer and objective game types on re-mastered maps. 5v5. - Team Slayer
Eliminate the enemy team across four Halo games: Halo: Combat Evolved, Halo 2, Halo 3, and Halo 2: Anniversary. Nothing but Team Slayer, 24/7. 4v4. - Big Team Battle
Battle it out in 16-player warfare with vehicles across Halo: Combat Evolved, Halo 2, Halo 3, Halo 4, and Halo 2: Anniversary. 8v8. - Halo: Combat Evolved
The game that started it all. Play a mix of Slayer and objective game types in Halo: Combat Evolved for the first time on Xbox Live. 4v4. - Halo 2 Classic
It’s back. A mix of the most popular Team Slayer and objective game types from the original Halo 2. 4v4. - Halo 3
A selection of fan-favorite Team Slayer and objective game types from Halo 3. 4v4. - Halo 4
A mix of Team Slayer and objective game types from Halo 4, on a selection of small to medium-sized maps. 5v5. - Team Hardcore
A collection of tournament-approved game types from Halo 2 and Halo 3. The Battle Rifle is your primary weapon. 4v4. - Halo eSports
The official Halo eSports playlist. 4v4. - SWAT (Rotational)
Aim for the head! A collection of SWAT game types on our favorite maps from Halo 2, Halo 3, Halo 4, and Halo 2: Anniversary. Players have no shields and are equipped with rifles. 4v4.
Also, via Frank (for you 2v2/Team Doubles fans, and fans of other gametypes):
Originally Posted by Stinkles
Dun worry there will be weekly rotational lists and consistent updates.