Here is the full list of all 13 Wall Street Tycoon achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Fire an employee, you soulless monster
Complete every milestone in the game
Make over $250,000 dollars in lawsuits
Use morale boosters 5 times
Hire your first 20 employees
Reach maximum upgrades for the office
Have 50,000 dollars in cash
Make a net profit of at least $1
Generate over $100,000 in profit during a single quarter
Boost employee morale with a motivational tool
Upgrade the office to help the business grow
Hire at least 3 employees
Hire your first employee