6 missable achievements (plus 12 unknown)
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"Complete Operation Cobra."
Spend 3 minutes using Focus in the campaign.
Easiest during 3rd mission (Stronghold). Focus is holding your breath while looking down the scope of a sniper rifle.
Complete the campaign.
Save 5 allies by throwing away a live enemy grenade.
Sneak through the courtyard undetected in Liberation.
Successfully escort the pole charge engineer to the pillbox in Hill 493.
Reach the sniper perch without being detected in Ambush.
Request Turner to toss you ammo 20 times.
Protect your tanks by shooting down all planes in Operation Cobra.
You can restart checkpoint if you miss without invalidating this. They come in this order: 3 right, 3 middle, 2 left, 2 left, 3 middle, 2 right, 2 left, 2 left, 1 middle.
Request Zussman to toss you First Aid Kits 30 times.
Sneak through the Dragon's Teeth undetected in Death Factory.
Request Stiles to toss you grenades 15 times
Request Aiello to toss you signal smoke and call in mortar strikes 10 times
Can be farmed by restarting checkpoints. Beginning of 3rd mission is a good place for this.
Get 6 groups of enemies to surrender.
Protect the bombers by personally shooting down 12 enemy planes.
Request Pierson to spot enemies 25 times.
Drag 10 allies to safety.
Cover Zussman from the church without missing a shot in Stronghold.
Disable 50 enemies using smoke grenades.
Complete the game on Veteran difficulty.
Save 8 allies locked in struggle.
Complete the driving portion of S.O.E. without hitting any obstacles.
Breach the seawall in under two minutes without taking MG fire.
First mission. Timer is not visible in-game. Stay close to Pearson and keep moving. You can restart checkpoints without invalidating this. The end is when you detonate the pole charge at the seawall.
Collect all 33 mementos.
Rescue your allies with the Sherman while keeping your armor above 80%.
Protect the convoy by shooting down all the planes in The Rhine.