Here is the full list of all 53 First Strike: Final Hour achievements.
Played as Australia
Won with Australia
Won with North Korea
Occupied all of Oceania!
Played as Europe
Won with Europe
Occupied all of Africa!
Won with China
Played as China
Achieved World Peace!
Played more than 10 games!
Played as North Korea
Won twice as Russia!
Play as Russia
Won with Russia
Won twice playing as the USA!
Played as Brazil
Won with Brazil
Played as the USA
Won with the USA
Occupied all of South America!
Won twice playing as Europe!
Won twice playing as North Korea!
Won twice as India & Pakistan!
Unlocked all Superweapons!
Won with every Nation!
Won against 8 opponents!
Won against 9 opponents!
Won against 10 opponents!
Deciphered end message!
Played more than 20 games!
Played more than 50 games!
Played as India & Pakistan
Won with India & Pakistan
Played as Israel
Won with Israel
Played as Iran
Won as Iran
Played as South Africa
Won with South Africa
Beat Hardcore Mode with USA
Beat Hardcore Mode with Europe
Beat Hardcore Mode with North Korea
Beat Hardcore Mode with Russia
Beat Hardcore Mode with India
Beat Hardcore Mode with Israel
Beat Hardcore Mode with China
Beat Hardcore Mode with Iran
Beat Hardcore Mode with Brazil
Beat Hardcore Mode with South Africa
Beat Hardcore Mode with Australia
Beat Hardcore Mode with Kazakhstan
Beat Hardcore Mode with every Superpower!