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