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.
Reach score of 10.000 in Tetrix.
Find all secrets.
Get to 10th round of the campaign.
Unlock all 12 ships.
Reach score of 100 millions.
Kill 100.000 troops.
Kill 60 troops with one hit.
Kill 10.000 ground targets.
Destroy 250.000 targets.
Crack 100 crates open.
Activate 100 devices with RemCon.
Pick up 100 hitchhikers.
Finish one level with Armageddonator.
Kill 100.000 air targets.
Finish game on hard difficulty or higher.
Find and capture all 9 galactic villains.
Find the secret base on lava planet's moon.
Find the secret science lab level.
Find Mr. Perfect's secret level.
Find the secret level with spammers.