Forgotten Hope Secret Weapon (FHSW) is an unofficial continuation of the famous Forgotten Hope (FH), a Battlefield 1942 modification. We say unofficial since FHSW is developed by FH fans, not the original FH creators. In 2007 it started as a small addon but since then it has grown to be one of the biggest mods of all time! What makes this mod special is that it adds lots of - but not only - Secret Weapons which saw limited or no action at all during WW2 like jet fighters and super heavy tanks. Some of the maps feature "what-if" battles like a landing operation on the Japanese mainland or attacking a secret German base in the African desert.
I have not been able to play this mod online(the three serves are almost always empty when I'm on), but from what I have heard this mod is excellent and brings alot of new features to the mod.
My only complaint so far is the lack of AI support that has been mentioned in a previous review and the lack of populated dedicated servers.
I hope that sometime in the near future there will be a similar mod for Forgotten Hope 2.