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