Here is the full list of all 26 Mare Nostrum achievements.
Destroy 10 moving motorbikes.
Get a 10 tank kill streak in the Matilda.
Win 5 matches as German forces
Destroy 100 enemy vehicles with German armour.
Win every official map as an Axis soldier.
Win every official map as an Allied soldier.
Destroy 20 tanks using the Boys anti-tank rifle.
Destroy 10 tanks using a captured Boys anti-tank rifle.
Win a match as every nationality.
Destroy a Matilda Tank using the "Elefantino" 47/32 ATG.
Win a match Tobruk Central as the Allied team 15 times.
Play 25 matches.
Kill 100 axis troops in a Vickers Light Tank.
Destroy 10 vickers tanks with an LG40.
Destroy 15 Bofors Anti-Aircraft guns.
Kill 10 Valentine tanks with a Geballte Ladung.
Win 10 matches as either British or Australian forces.
Win 5 matches as Polish forces.
Win 5 matches as Italian forces.
Play 100 matches.
Play 250 matches.
Capture 75 objectives as an Allied soldier.
Capture 75 objectives as a German soldier.
Capture 75 objectives as an Italian soldier.
Destroy 100 enemy vehicles with Allied armour.
Destroy 100 enemy vehicles with Italian armour.