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