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