

Achtung Panzer is a custom German campaign made for Blitzkrieg. It contains 32 missions divided into 11 chapters.
Bootcamp
Tiny episode added only because of the Blitzkrieg engine.
Fall Weiss
Invasion of Poland.
Fall Gelb
First phase of the western offensive in 1940.
Afrika Korps
Rommel's first offensive in North Africa in order to help the Italians.
Barbarossa
Invasion of Soviet Union - first phase till the end of September 1941.
Taifun
Assault on Moscow known as operation Typhoon.
Operation Blau
That custom campaign you already know. Revised a bit and incorporated into the campaign.
Kharkov 1943
Stabilization of the Russian front during the early months of 1943 (after Stalingrad).
Gustav line
Defence of the Gustav line in Italy.
Wacht am Rhein
Battle of the bulge played from the German perspective.
Doomsday
Final battle of Berlin.
Even if Achtung Panzer doesn't require any mod to be played, it will introduce a bit modified conception of fight.
Use your artillery to weaken the enemy defensive positions before an attack
Your artillery batteries are mostly so distant from the enemy artillery that you both can provide artillery support for your soldiers without eliminating each other.
Provide an air support to your bombers...
Relax times were shortened to allow you to provide fighter cover for your bombers and ground attack planes.
...and fight for the air superiority
Most of the time, you will see more fighters simultaneously in the sky than that common known duo which will make the planes fight each other less problematically.
Use solid river crossings...
Sometimes you will have to cross the river and mainly, the decision where to cross it will be up to you.
...or build your own
You can also bypass the enemy defensive positions by building your own river crossings.
Combined arms policy is a key to success...
Many enemy positions are heavily defended so without combining artillery, airforce, tanks and infantry, you will not succeed.
...but infantry is essential for the battles in the streets where tanks are vulnerable
You will have more infantry than tanks at your disposal so you can use infantrymen to destroy heavier enemy tanks which could cause heavy losses to your own armored units.