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