EA is attaching a key for access into the Battlefield 3 beta in every copy of Medal of Honor. Medal of Honor’s multi-player is being developed by DICE, the Swedish studio behind the Battlefield series and Mirror’s Edge, while the single-player is being developed in house at EA. DICE has become famous for their approach to objective based multi-player games. This will be the first entry in the Battlefield series proper in 5 years. You can see EA’s official website here.