2. There aren’t any real cheats for Medal of Honor Heroes 2. But this is what cheatplanet had:

Map Awards
Base Demolition – Put a permanent end to the Further’s pet preoject.
Beach Attack – Land on the beach with the 5th Rangers, and push through the German defenses.
Destroy the Guns – To protect Allied bombers, five Anti-Air gun batteries need to be knocked out.
Destroy Train – Fight your way through the fields to the Train Station. Whatever is on that train is too important to let go.
Monastery Assault – A key figure has set up a base of operation in a remote monastery. ***** the defenses and get whatever information you can.
Sink U-boats – Take out three U-boats in the port area.
Through the Sewers – The Germans have holed up undergound. Go take them out while staying safe from Allied bombardment.

Special Awards
Combat Basic – Awarded for killing 100 enemy soldiers on the battlefield.
Combat Master – Awarded for killing 500 enemy soldiers on the battlefield.
Combat Senior – Awarded for killing 250 enemy soldiers on the battlefield.
Endurance – Awarded for completing a Mission without being critically injured once.
Green Survivor – Awarded for completing a Mission on Green without dying once.
Grenade Combat – Awarded for killing 25 enemy soldiers with the gernades.
Hero Survivor – Awarded for completing a Mission on Hero without dying once.
Heroism – Awarded for completing Campaign mode on the Hero difficulty setting.
LMG Combat – Awarded for killing 150 enemy soldiers with the BAR or STG44 light machine guns.
Machine Gun Combat – Awarded for killing 50 enemy soldiers with the MG42 machine gun.
Marksmanship – Awarded for completing a Mission with 75% accuracy.
Melee Combat – Awarded for killing 25 enemy soldiers in melee combat.
Participant – Awarded for completing Campaign mode on the Green difficulty setting.
Pistol Combat – Awarded for killing 50 enemy soldiers with the Colt.45 or Luger pistol.
Rifle Combat – Awarded for killing 50 enemy soldiers with the M1 Garand or Karabiner 98K rifles.
Rocket Combat – Awarded for killing 25 enemy soldiers with the Bazooka or Panzerschrek rocket launcher.
Sharpshooter – Awarded for achieving 100 headshots on the battlefield.
Shotgun Combat – Awarded for killing 50 enemy soldiers with the shotgun.
SMG Combat – Awarded for killing 250 enemy soldiers with the Thompson or MP40 sub machine guns.
Sniper Combat – Awarded for killing 50 enemy soldiers with the scoped Gewehr rifle or the scoped Springfield rifle.
Veteran – Awarded for completing Campaign mode on the Veteran difficulty setting.
Veteran Survivor – Awarded for completing a Mission in Veteran without dying once.
Weapon Expert – Awarded for getting at least 1 kill with each weapon in the game.

3. Not Applicable.