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