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