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