The original Medal of Honor was developed by DreamWorks Interactive and published by Electronic Arts for PlayStation in 1999. However, the project started life in late 1997, when Steven Spielberg pitched an idea for a new WW2 era first person shooter to DI. When you complete all the missions in the game, you can unlock a bonus gallery that show an early prototype / beta version of the game, with different levels and 3D models. An official trailer for the game released in 1998 as an extra in Small Soldiers also show the removed Panzer Attack mission and a different HUD, in a version of the game with much more blood and gore than the final version. If you recently played Medal of Honor and you can notice more differences, leave a comment below!
Thanks to MicroChirp, LeHah and K Ill A Pinke for the contributions!