Here is the full list of all 21 Children of the Sun achievements.
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Two in One
The Sun shines through
Appealing views from the top
Just passing through
He is blocking the entrance
350 meters are a long way
Drifting into their conclusion
Some are on the run
Open Gates through their Hearts
Bullets that burn, are Bullets that hurt
Gas Tanks make the World burn brighter
The Virus is in their heads
When it moves, it spreads
Most can burn, but inside they can't
Through their homes
Avoid the Debris
It's been a long time
Consecutive prayers kill
Direct hits hit the hardest
Precise deviation might gets things on fire