A dead pig can be found during the start of the Guadalcanal level. It was put in there as an inside team joke as the team had more rib dinners over the course of development than on any project.
The airfield alone in the Guadacanal level is bigger than most maps from Medal of Honor: Allied Assault.
Once the truck asset was completed, it was realized they couldn't fit every member from Conlin's squad, so they purposely forced a member to run off during a Japanese artillery attack, and subsequently die moments later.
In order to make the Japanese soldiers fight more intelligently, there are over 520 cover nodes placed in Tarawa.
The M92 HMG found in many places in the game actually used 30-round stripper clips. However, the team found that the gun ate through that many bullets too fast, so they doubled the clip to improve gameplay.