You play as a battlegroup from your selected division based on their TO&E during the campaign. You build up a "deck" of unit "cards" which you can introduce during the battle, which is broken up into three phases; phase A is basically reconnaissance in force, phase B is your meeting engagement, and phase C is where your reserves come in. You can customise the way each division plays, because the phase in which you choose your cards will influence their availability, for example you could have one Tiger I right at the beginning of the battle, or four during phase C. I've had good results by doubling-down on waves of Panzer IIIs in phase A (denying the enemy strategic ground), as well as holding the line until phase C to bring out two platoons' worth of IS-2s to break through whatever defenses they may have built up.
I've noticed a few weird details on some tanks (they might be basing some of their in-game models on plastic kits?), but you're typically playing from a birds-eye view to keep an eye on the tactical situation.
Otherwise it's a great-looking game with a lot of content and replayability, even if you don't play against other people online.
It's currently on sale on Steam for 66% off, which is a bit of a steal. I think the general deluxe version includes almost all of the expansions and add-ons.
