2) 2 vs 2 multi-player.
2) Stalingrad expansion--with several good MP scenarios

3) Add fortifications to deployable OB, ie the map may not be finished until scenario starts
4) Add fortification types:
--barbed wire
--minefields (AP and AT)
--AT ditches
--fortify building by converting to light or heavy fortification but without changing graphic (hello Stalingrad)
5) smoke:
--reduces effectiveness of fire through smoke tile but does not block
--effectiveness declines each turn
--affects fire in to (-30%) out of (-50%), or through (-40%)
--effect is cumulative for each smoke hex affecting firing unit
--effect is cumulative with terrain
--ordnance generated smoke lasts longer than infantry smoke
6) clicking on enemy unit shows all spaces it has LOS to (max 5 tile range)
7) Scouting works through woods, buildings etc. (currently is not much good except in urban environments)
8. Sewer movement (again, hello Stalingrad)