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