Here is the full list of all 22 Vostok 2061 achievements worth 1,000 gamerscore.
Pass the exam on the shooting range
Escort the cargo ship on the level 2
Clean up the territory of the level 3
Get through the fourth level
Get through the fifth level
Rescue all prisoners on the sixth level
Get through the seventh level
Repel an enemy attack at level 8
Find secret present
Defeat evil at the final Level
Escort the cargo ship on the level 2 on the first try
Clean up the territory of the level 3 on the first try
Get through the fourth level on the first try
Get through the fifth level on the first try
Rescue all prisoners on the sixth level on the first try
Get through the seventh level on the first try
Repel an enemy attack at level 8 on the first try
Defeat evil at the final Level on the first try
Shoot down 500 targets and stay alive
Shoot down 1000 targets and stay alive
Shoot down 1500 targets and stay alive
Find and shoot 8 alien evil fish