Here is the full list of all 48 Space Pirates and Zombies achievements. It takes around 100-120 hours to unlock all of the achievements on Windows.
Beat all 10 arena ladders and all 5 tiers on bronze, silver and gold level. Be the champ of 150 events..
Defeat a Tier 3 Bounty Hunter Stronghold in Chapter 4. In short, do the impossible. You have our sympathy.
Feed Santa so much milk and cookies, that an elf falls off his sleigh
Complete the Game on Insane
Clear all zombie infection
Collect 25,000 Goons
Explore 150 Star Systems
Complete the Game
Complete the Game on Expert
Never use Respec
Reach Tech Level 100
Collect a Godlike Specialist
Complete 100 Missions
Collect 100,000 Rez
Research a Category to Level 10
The Clockwork II
Unlock All Components
Unlock All Ship Hulls
Destroy 25 Starbases
Destroy 2500 Enemy Ships
Destroy a Tier 3 UTA Base
Collect a Rare Specialist
Beat a Warpgate 10 levels higher than you
Destroy a Tier 3 CIV Base
Reach Tech Level 50
Upgrade the Clockwork
Bribe Past 5 Warpgates
Explore 50 Star Systems
Collect 2,500 Goons
Bribe Star Relations 5 Times
Collect 10,000 Rez
Space 250 Goons
Collect an Elite Specialist
Retire a Specialist
Mass Retreat 5 Times
Destroy 500 Enemy Ships
Train a Specialist to Expert
Explore 10 Star Systems
Complete 25 Missions
Collect 250 Goons
Collect a Common Specialist
Collect an Uncommon Specialist
Reach Tech Level 10
Collect 1,000 Rez
Destroy 100 Enemy Ships
Escape the Sol System
Complete 5 Missions
Repair the Clockwork