From: Lower Saxony Germany
You do have the scenarios or fixed games built in. What is very appealing is the random game.
In random game you can decide the size of the map from small to huge. You can decide what kind of terrain you want large water masses or small. Rivers, forests, mountains, swamps. Seasons also play a role dry and wet seasons. So you can get stuck into mud or swamps can freeze and are passable in winter.
How many opponants you want. AI or human both are possible, thus you can play against the AI or a few human players. Multiplayer is only possible through PBEM.
So you play your turn, the next player, and everybody takes their turn till it's your turn again.
You can decide what kind of units you want to build, although often you have to adapt to the terrain and also the enemy.
If he is building a massive airfleet you'll need either flak or planes to defend yourself.
Mech units are also possible but they need supplies, beans and bullets, oil. You can run out of oil, then your panzers are sitting dry and can only shoot but not move. Bad if your on the offensive.
So you can see the game is a vary of Quatermaster and General. Tons of fun.
And every map can be different.
You will not regret buying the game. Just read some of the AAR's to get a picture of it.
"It is not enough to expect a man to pay for the best, you must also give him what he pays for." Alfred Dunhill