Here is the full list of all 15 Software Inc. achievements.
Make the game in the game with the company and the developer
Have somebody perish in a fire
Play for 10 years with 8 days per month
Play for 80 years
Have over 500 employees
Have 10 employees sue you in a class action
Cancel a project after receiving publisher funding and successfully win the lawsuit
Have a police drone break through walls to confiscate precious metals
Buy out another player's company
Release a product with approximately equal revenue share with other players
Release 10 sequels for the same IP
Take over 5 companies in one year
Try to duplicate precious metals in build mode
Win a platinum award by winning 5 years in a row
Interact with all features of the game