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