Here is the full list of all 24 Spaceport Hope achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Unlock all the weapons
Explore all the world
Complete all the NPC quests
Die 50 times
Beat the final boss
Beat the final boss with only the 1st gun
Die in the tutorial level
Kill 500 enemies
Find the hacker hideout
Assemble the ultimate weapon
Collect 10000 coins
Update your main weapon
Unlock a new outfit
Buy a new ship
Visit the about menu
Find 10 chests
Go underwater
Find the island
Kill 100 enemies
Collect 1000 coins
Buy a weapon
Kill an enemy
Find a chest
Talk to all NPCs