I am NOT a lawyer, I did NOT go to law school, and this is NOT legal advice. If you have any concerns about any licensing, legal, or copyright claims on the assets you use please seek out a legal professional. This blog post is only meant to be a introduction into licensing and I do not claim to have a comprehensive understanding of how licensing works.
You should always seek professional advice when available and be sure to read any / all terms and conditions of any products or services that you use. This article is for educational purposes only and should not be used as legal advice should you ever get into a licensing issue.
That aside, using remade game assets is a great way to save time, prototype your game, and help you out along the path of game development. That said, it will always be more rewarding to create and use your own assets in any endeavor.
What are Game Assets:
Assets in regards to the Unity Engine are objects like sprites, sound effects, and music. These assets are what make your game truly come to life. This blog post will give you a list of places to start looking for some game assets that you can plug in and use in any game, but I prefer that you learn from these assets and make your own.
Fantastic Assets and Where to Find Them:
The Unity Asset store is a great place to get all manor of unity assets. They have plugins that you can use to develop your games and they have placeholder art assets that developers use to demonstrate level layout and sprite rendering size. This Online repository of assets offers up both paid and free assets for you to import into your game. The Unity Documentation provides a tutorial on installing these assets from the online store that you can view here.
Open Game Art is a neat place that caters to a wide array of game development. They mostly offer game art assets like sprites and 3D models, but they have a good-sized collection of game music and sound effects. There assets are uploaded by independent users and are often free to use. However, be sure to read the licensing type on the asset before you implement an asset into a commercial project. Open Game Art also offers an assortment of data documents that you can use to generate things like town names.
Textures is a image hosting site that has been around for a good long time. They recently re-designed their website and are now offering a much larger selection of images for users to choose from. They offer up varying sizes of images separated into material genres. There website does require that you make an account to download these images, and you can only download 15 credits worth of images per day. (1:1 on credits to images usually) They of course offer premium services, and I highly recommend this site if for reference images when making both 2D and 3D art.
BFXR is an online sound effects generator and editor. This site allows the user to create, manipulate, and save sounds created with their wav generation algorithm. This tool alone is worth it’s domain name in gold. The sounds you make are yours to use and keep, and there site is free to use without a pesky login.
I cannot stress enough the importance of checking the license on a asset before you implement it. For more on licensing and a deeper dive into the topic I recommend this article: Understanding Licenses by Sonny Bone