The story is essentially told as a "reflection" on the events that took place earlier, as Army historian Colonel S.L.A. Marshall is interviewing paratroopers 15+ days after D-Day. The story is divided into three parts. The first part of the game is a recollection of Hartsock's time in Sergeant Matt Baker's squad during the initial D-Day invasion. The second part picks up when he takes command of 2nd Squad, 3rd Platoon during the liberation and defense of Carentan, and the eventual link-up between 82nd and 101st Airborne Division at the town of Baupte. The final part will take place in and around Saint-Sauveur-le-Vicomte. Although the first part takes place under Baker's command, every mission is one not included in Road to Hill 30. The player commands Desola, Allen, and Garnett from 3rd Squad, and some soldiers from 2nd Squad at first. Then the game switches the player to command the entire 2nd Squad after the Battle of Bloody Gulch (Hill 30).

Hartsock's squad consists of the remains of the original 2nd Squad (Cpl. Franklin Paddock, Pvt. Dean "Friar" Winchell, and Pfc. James Marsh) and the remnants of 1st Squad (Cpl. Jacob Campbell, Pvt. Will Paige, and Pvt. Derrick McConnell). In addition, the player will also be in command of Corporal (later promoted to Sergeant) Seamus Doyle of the 82nd Airborne during the initial D-Day invasion in early parts of the game.

The gameplay in Earned in Blood is similar to Brothers in Arms: Road to Hill 30. The player usually assumes command of two teams of paratroopers to use the Four Fs - Find, Fix, Flank, and Finish—tactic against the enemy. The game discourages the use of solo run 'n' gun tactics by limiting the player's ability to aim, by decreasing the player's health, and by placing large numbers of enemies behind cover. To successfully complete a mission, the player has to study the layout of the battlefield, fix/suppress the enemy with overwhelming suppressive fire with one team (usually the fire team), and direct another team (usually the assault team) to flank the enemy by sneaking to the side or rear of the enemy to finish them off.

In Earned in Blood, the enemy constantly repositions according to the player's action, regardless of danger. This change makes stealth and distraction important considerations when the player is attempting to flank the enemy. At the same time, tactics such as forcing the enemy into kill zones is possible. The enemy AI allows the player to be attacked more frequently.

The games uses the same graphics engine as Brothers in Arms: Road to Hill 30, which is based on the Unreal Engine 2.0.

Brothers in Arms: Earned in Blood received "generally favorable" for PC and Xbox, and "mixed or average" for PS2 reviews, according to review aggregator Metacritic.^[24][25][26]

During the 9th Annual Interactive Achievement Awards, Earned in Blood received a nomination for "Outstanding Achievement in Story and Character Development".^[27]

• Brothers in Arms official website
• Brothers in Arms: Earned in Blood at MobyGames