Here is the full list of all 22 Jets'n'Guns Gold achievements.
Destroy 250.000 targets.
Kill 100.000 air targets.
Kill 10.000 ground targets.
Kill 100.000 troops.
Get to 10th round of the campaign.
Reach score of 100 millions.
Make one hero obtain all medals.
Pick up 100 hitchhikers.
Unlock all 12 ships.
Reach score of 10.000 in Tetrix.
Find all secrets.
Finish one level with Armageddonator.
Finish campaign without being shot down.
Finish game on hard difficulty or higher.
Find the secret science lab level.
Kill 60 troops with one hit.
Activate 100 devices with RemCon.
Find Mr. Perfect's secret level.
Find and capture all 9 galactic villains.
Crack 100 crates open.
Find the secret base on lava planet's moon.
Find the secret level with spammers.