At this stage, you should have your trade marks and all relevant contracts sorted, making sure that the intellectual property in the video game is dealt with correctly.
Another item to check before launch is that you have the correct licences to use the game engine. For example, Unity and Unreal Engine are popular game engines, but they have tiered subscription licences – you should make sure that you have the correct subscription.
Then it’s time to consider how you will publish. If you are self-publishing, make sure you understand the terms of the platform you are launching on (Steam, Xbox, Playstation and Nintendo are likely to have their own terms and requirements, so it’s worth checking them). If you’ve got a publisher on board, then make sure you have an agreement in place – you’ll want to ensure you retain the intellectual property in your video game, as this is your most precious asset!