Today, via Twitter, Microsoft's Major Nelson announced that Guardian Heroes and Operation Flashpoint: Red River have joined the Xbox One Backwards Compatible Lineup.

For those unfamiliar with the two, here are some handy-dandy overviews:

Operation Flashpoint: Red River:

Stand together with the US Marines in Operation Flashpoint: Red River, the ultimate tactical infantry shooter.

You’ll play as one of four distinct and complimentary classes in a Marine Fireteam – Grenadier, Scout, Rifleman and Automatic Rifleman - as you embark on an epic campaign. Take on huge sandbox battlefields in the new setting of Tajikistan, a geopolitical hotspot bordered by Afghanistan and China. Face the unpredictable threat of all-new insurgent enemies and the might of the world’s largest Army, the Chinese PLA. Use authentic tactics on your own initiative in solo or in four player drop-in, drop-out co-op campaign.

For extended replayability, Operation Flashpoint: Red River also includes new class choice, load-out personalization plus standalone co-op Fireteam Engagements. With a huge range of authentic weapons and the chance to call in devastating airstrikes, Operation Flashpoint: Red River will put you in the boots of a Marine like never before.

Guardian Heroes:

Guardian Heroes takes the 1996 Saturn game and gives it a full HD makeover as well as sprinkling a few new online modes onto the scrolling beat 'em-up/RPG hybrid.

You can see the whole Xbox One Backwards Compatable lineup here.