I'm starting a team that I want to call Icicle Games. And in my agreement that I plan on having team members sign, I would like to refer to the team name (for example: "All asset files become the property of Icicle Games, blah blah blah"). Is that allowed? Or do I need to use my name? I might end up registering a company (sole proprietorship) at some point, but I'm not ready to do that yet. I live in the US.

Read about collaboration agreements on underdevelopmentlaw.com (just Google that).

Read about collaboration agreements on underdevelopmentlaw.com (just Google that).

Oh man why haven't I found that blog sooner! Thanks XD

The answer depends on who will own the IP in the assets created by team members: (1) your company or (2) individual team members. If Option 1, you need a work for hire agreement. If Option 2, you need either a collaboration agreement or a license.

Obviously your team name is not a separate entity yet so you will need to either incorporate under the laws of your state or identify the individuals that own the company. Good luck!