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.
Complete the Game
Destroy 2500 Enemy Ships
Unlock All Ship Hulls
Reach Tech Level 100
Research a Category to Level 10
Complete 100 Missions
The Clockwork II
Collect 100,000 Rez
Reach Tech Level 50
Destroy a Tier 3 CIV Base
Destroy a Tier 3 UTA Base
Explore 50 Star Systems
Upgrade the Clockwork
Collect 2,500 Goons
Collect a Godlike Specialist
Space 250 Goons
Bribe Past 5 Warpgates
Destroy 500 Enemy Ships
Explore 10 Star Systems
Collect an Uncommon Specialist
Retire a Specialist
Collect 10,000 Rez
Complete 25 Missions
Train a Specialist to Expert
Bribe Star Relations 5 Times
Mass Retreat 5 Times
Collect a Common Specialist
Collect an Elite Specialist
Collect 250 Goons
Reach Tech Level 10
Destroy 100 Enemy Ships
Collect a Rare Specialist
Escape the Sol System
Collect 1,000 Rez
Complete 5 Missions
Repair the Clockwork
Collect 25,000 Goons
Destroy 25 Starbases
Explore 150 Star Systems
Unlock All Components
Complete the Game on Expert
Complete the Game on Insane
Never use Respec
Beat a Warpgate 10 levels higher than you
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..
Defeat a Tier 3 Bounty Hunter Stronghold in Chapter 4. In short, do the impossible. You have our sympathy.