[Vorondil]

I might have missed a few, and some info might be off, feel free to correct me y'all if you spot anything.

Official Games or Add-ons:

IL-2 Sturmovik

This is the first and original game

IL-2 Sturmovik: Forgotten Battles

This was first meant to be an add-on, hence the name, but during Oleg Maddox' work this add-on project grew so large and extensive, that he decided to release it as a Stand-Alone game instead. It features all aircrafts and maps from the first and original game, but not the single player missions, single player campaigns or multi player missions. These can however be downloaded somewhere on this site I think, if I'm not mistaken. As such, the Original game is rendered entirely obsolete.

IL-2 Sturmovik: Forgotten Battles: Ace Expansion Pack

This is a geniune Expansion, and requires IL2:FB to be installed

Pacific Fighters

This came with the possibility to either be installed as a separate Stand-Alone game, or to be merged with IL2:FB and IL2:FB:AEP into a "Merged Installation"

Pe-2

This featured a set of russian bombers in the "Petlyakov Pe-2" and "Petlyakov Pe-3" plane families. It required the merged installation of Pacific Fighters to be installed.

Sturmoviks over Manchuria

Yet another add-on, which required a merged installation of all the above mentioned games (except The Original) to be installed.

1946

Yet another add-on, which required a merged installation of all the above mentioned games (except The Original) to be installed.

1946 Compilation Pack:

This is, as mentioned, a compilation pack. It features ALL of the six above mentioned parts of the IL-2 chronology (except The Original) on one DVD-disc. This is the one you shall be looking for on store shelves when hunting for IL-2 fun! Here is a link for Play.com, it is also featured on Steam. It is currently patched to v4.08, with a BETA-version v4.09b available. (BETA is without Online Play.)

Unofficial Add-ons, or rather, 'Mission Packs':

For IL-2 Sturmovik (The Original):
(I do not know whether these can be installed into the "1946: Compilation Pack" or not)

• Eastern Thunder
• Operation Barbarossa

For IL-2 Sturmovik: Forgotten Battles:

• Battle over Europe
• Combat over Europe
• Operation - Fall Blau
• Rebirth of Honor

These six titles (plus a seventh "Operation Barbarossa: Special Edition") can be seen here. Note that this is a Swedish webstore, however the descriptions of the game are in english. The games are also listed as discontinued and thus cannot be ordered.