Here is the full list of all 13 War Thunder achievements worth 1,000 gamerscore.
Destroy 100 player units while in a tank in random battles
Destroy 100 player units while in an airplane in random battles
Destroy 3,000 player vehicles in Random Battles
Achieve (random battles): Mission Maker, Hero of the Sky, Thunderer, Heavy Metal Hero, Wing Breaker.
Destroy a player airplane with a rocket in random battles. Complete the Mission.
Win a battle at rank V with 1st place in the match statistics in random battles. Activity: 50%
Destroy 500 vehicles while in an airplane using bombs in random battles
Destroy 50 airplanes with an anti-air gun in random battles
Win 10 battles at rank four for the USSR in random battles. Battle activity: 50%
Win 10 battles at rank four for the USA in random battles. Battle activity: 50%
Win 10 battles at rank four for Britain in random battles. Battle activity: 50%
Win 10 battles at rank four for Germany in random battles. Battle activity: 50%
Win 10 battles at rank four for Japan in random battles. Battle activity: 50%