Can I make money on my game?

If I develop a game with the free version of Unity, am I able to sell it and make money on it?

Here is the answer directly from unity

Yes you can create and sell a game
with the free version of Unity,
without paying royalties or any
revenue share. However, the free
version of Unity may not be licensed
by a commercial entity with annual
gross revenues (based on fiscal year)
in excess of US$100,000

So unless your games makes over 100k a year you don’t have to pay! and if you make 100k from your game i’m sure buying unity won’t be a problem

Edit
Keep in mind anything that you made with a Pro trial licenses cannot be distributed

yes, you can if is less than $100.000/year, but if you use trial of unity pro, you can’t sell it.

The real question is “Can I make a game so good that people pay for it?”