Game needs more unlock hidden items.

[Keither]

I think the game would be more exciting if it has unlock hidden items such as characters, buildings, or features that trigger after certain criterias are met.
For examples:
If player company is able to reach $10b in valuation then a new character/investor with random expertise will be unlocked.
If a city has achieved population growth of at least 2% annually then an unlocked building such as a new CBD will be automatically build.
Of course, the players will find out these unlocked items by themselves.

To me the most exciting things about the game so far have been stock market and new products through research, which players are being told when the new product/tech will be available.