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.
Feed Santa so much milk and cookies, that an elf falls off his sleigh
Never use Respec
Complete the Game
Clear all zombie infection
Complete 100 Missions
Unlock All Components
Reach Tech Level 100
Destroy 2500 Enemy Ships
Research a Category to Level 10
The Clockwork II
Unlock All Ship Hulls
Collect 100,000 Rez
Destroy a Tier 3 UTA Base
Explore 50 Star Systems
Bribe Past 5 Warpgates
Bribe Star Relations 5 Times
Collect 2,500 Goons
Reach Tech Level 50
Beat a Warpgate 10 levels higher than you
Upgrade the Clockwork
Complete 25 Missions
Destroy 500 Enemy Ships
Mass Retreat 5 Times
Collect 10,000 Rez
Space 250 Goons
Destroy a Tier 3 CIV Base
Collect an Elite Specialist
Collect an Uncommon Specialist
Retire a Specialist
Collect a Godlike Specialist
Train a Specialist to Expert
Collect a Rare Specialist
Collect a Common Specialist
Destroy 100 Enemy Ships
Complete 5 Missions
Collect 250 Goons
Reach Tech Level 10
Explore 10 Star Systems
Collect 1,000 Rez
Escape the Sol System
Repair the Clockwork
Collect 25,000 Goons
Destroy 25 Starbases
Explore 150 Star Systems
Complete the Game on Expert
Complete the Game on Insane
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.