A Suppressor is an attachment for some weapons throughout the Medal of Honor series. In the games prior to Medal of Honor (2010), suppressors were rare to find, but all serve the same purpose; to maintain stealth. An example of a suppressed weapon is the Welrod handgun in Medal of Honor: Rising Sun.
Medal of Honor (2010)
In multiplayer, the suppressor is an available attachment. It gives players the option of stealth at the cost of 0.75x damage. The suppressor makes it so that the player does not show up on the Radar for the enemy team, also making the weapon quieter.