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