Even though the Arcade Mode and the Campaign Mode is almost the same, there's bound to be things that might be vital to finish the game and some pointers that will help you finish the game especially when it comes to using weapons and the difference between Wii Remote and Nunchuk and the Wii Zapper.
The main difference is with the Campaign Mode, you move around at your own pace. Also, the levels leaves you more things to do but has hidden objectives that has yet uncovered from Arcade Mode.
The Arcade Mode is more smoother than the Campaign Mode. What's not included that would ruin the pace is the ability to tune the radio and go through the minefield. Also if you want to crouch or duck behind cover, you have to use 
to do so and again to stand and shoot.
Port
Primary Objectives:
- Destroy the German U-boats
- Find a radio and contact OSS Control (Campaign only)
- Secure the docks and advance to the city
- Find a way into the sub pens
- Assault the guardhouse and bazooka the fuel tank
- Find a sniper rifle and soften up the guardhouse
Secondary Objectives:
- Hold your ground against reinforcements
- Intercept the U-boat shipping manifest
- Cover Baker Company with the Panzerschreck
- Eliminate the U-boat Commander
This level is a little harder. When you get to the U-Boats, to set the explosives, tilt the 
on the right side and when it's in full circle, flick up to complete it. Same with the Wii Zapper.
The sniper might be hard to use at first. Aim with 
, tilt the 
left or right to adjust the zoom and 
to fire. For the Wii Zapper, aim with 
, zoom in and out with 
/ and to fire.
The bazooka requires a unique method. You need to turn the upside down to aim, move the aim with the 
and fire with . For the Wii Zapper, you don't have to turn that upside down but you have to aim with , move the Wii Zapper to move your aim and fire with .
The radio is curiously the easiest to deal with except you only have 30 seconds to find the female officer who is saying "Come in, come in." You just need to tilt the left or right to change the frequency and the to lock on. The Wii Zapper is more easier, you just need to move it 
or 
to change the frequency and the to lock on.
There's a blue safe somewhere in the warehouse where the U-boats were and the U-Boat Commander could be in there. The Arcade version will have a yellow marker on his head so be ready to react and shoot him before he disappears off screen.
City
Primary Objectives:
- Destroy the East and West anti-aircraft guns
- Escape the city
- Destroy the rooftop anti-aircraft guns
- Find a radio and contact OSS Control (Campaign only)
Secondary Objectives:
- Obtain Axis troop deployment plans
- Disable Axis officer car in the North District
- Disable Axis officer car in the South District
You'll have to search at least two german cars that can be destroy if you can find it through the level.
The Artillery could be hard at first but you can still get the hang of it. To move it left or right, move your in a circle either clockwise or anti-clockwise and swing up to fire. On the Wii Zapper, you move the in a circle and press to fire.
Sewers
Primary Objectives:
- Find a Radio and contact OSS control (Campaign only)
- Sabotage underground shelter
- Rendezvous with the Rangers at the sewer exit
- Survive upper tunnel ambush
Secondary Objectives:
- Sabotage the generator
- Uncover the scientist interrogation transcripts
- Retrieve the POW list
Surviving the upper tunnel can be hard but for to aim for the people in the top or the circular area, hold or for the Wii Zapper to get a more accurate shot.
Look out for the blue safe to get the transcripts and the POW list. Also find a generator in the centre to blow up using the explosives.
When you get to the last part of the area, take a step at a time and watch out for a german soldier with a bazooka as he'll temporarily stop you in your tracks as he's above the tunnel exit of the area.
Monastery
Primary Objectives:
- Cover the squad as they secure the Courtyard
- Take out Axis forces in the Monastery
- Destroy the German convoy
- Find a way to let the squad into the chapel
Secondary Objectives:
- Protect the Graveyard from the Axis counterattack
- Find the classified development schedule
- Protect the motorcade from the Axis counterattack
- Find a radio and contact OSS Control (Campaign only)
- Retrieve Uranium docket
There's a machine gun mount where the graveyard is. To use the machine gun mount, you have to move both the and in the same direction parallel to each other and fire with . The Wii Zapper will use the to move the machine gun and to fire.
Find the blue safes for Uranium dockets and the classified developments. Also don't forget to tune the radio to find out more about your mission.
Bombed City
Primary Objectives:
- Meet with Captain Lasry and help extricate his intel
- Rally with Baker Company on the other side of town
- Find your way through the minefield (Campaign only)
- Defend against Axis counterattack
Secondary Objectives:
- Take out SS agent
- Rescue stranded squad
- Retrieve POW records
- Find a radio and contact HQ (Campaign only)
In the Arcade Mode, if you see the german soldier with a yellor marker on his shoot him before he disappears. Shoot the blue safe to get the documents and tune the radio for more information on your mission.
The minefield is actually the hardest to deal with in this game. You move with or Wii Zapper left or right. You must take it nice and slow and if the mine detector alerts you to the mine, either step back or move to the side until it doesn't detect anything. When the detector doesn't detect anything, that's when you can move in.
When you reach the stranded squad, set the explosives so that the other soldiers would help you in this mission.
What you need to remember the most for the remainder of this mission and the next is the way you stop the germans respawning is to go to that area where they respawn and it will stop completely.
Village
Primary Objectives:
- Intercept the V2
- Flank the MMG
- Secure the two farm-houses
- Use the mortar to hold off Axis reinforcements
- Overrun the MMG with Baker Company
Secondary Objectives:
- Hold the village
- Radio HQ for new intel (Campaign only)
- Retrieve strike co-ordinates
- Neutralize the SS officer stationed on the farm
- Repel counter-attack
- Hook up with Baker Co. survivors
- Neutralize the SS officer stationed in the village
This is a fairly hard level. You need to pace yourself if you want to complete this mission. Look out for blue safes and the radio to tune. Also try to find officers who might be hidden in the village and the farm.
To use the mortar might be hard when you are going shot by the soldiers but you'll pick it up quickly if you follow the on screen displays on how it works. Move / to set the distance on where it's going to drop, tilt to move the mortar left or right and swing up to fire. For the Wii Zapper, move / to set the distance, / to move the mortar left or right and to fire.
Base
Primary Objectives:
- Navigate the Minefield (Campaign only)
- Destroy fuel tank
- Infiltrate V2 Facility
- Find a way to sabotage V2 Production
- Escape
- Use a sniper rifle to repel the assault
Secondary Objectives:
- Defend against rear attack
- Radio OSS Control (Campaign only)
- Destroy anti-aircraft gun
- Steal the warhead blue-prints
Provided that you learned everything before this level you need to really be flexible with your aim and fire against a horde or soldiers who will stop at nothing to destroy you.
You're going to have to find the last blue safe and the radio. Also take out the germans after you go through the minefield and use the artillery to take down the anti-aircraft gun.
It's hard to use the explosives when you're distracted so make sure you clear the area before you use it. Also when you reach the end, when you open the large door in the control room, you have five minutes to get out and is indeed the most challenging part of the game. When the doors open try to take down the germans and if you get hurt, that's when you go down, take down the germans that are respawning and open the next door. Do the same but watch out for germans coming from the other end. Also don't bring the bazooka for this last part. The reason is you'll run out of ammo quickly. For the last part, open the door near the exit and after dealing with the last of the soldiers outside your area, use the machine gun mount and really take out the last of the germans until it's clear for you to go out.