フリーアセット
ストア：
Top Free Assets | Unity Asset Store [Official]
スターターアセット (Starter Assets)
動画：
参考：
Starter Assets – First Person Character Controller 
Unity Technologies Asset Store
Starter Assets – First Person Character Controller Unity Technologies Asset Store
新しい Starter Asset パッケージ登場 | Unity Blog [公式]
Starter Assets の動かし方 | ねこじゃらシティ
Starter Assets でユニティちゃんを動かす | ねこじゃらシティ
Say hello to the new Starter Asset packages | Unity Forum
テストステージ
Standard Assets Unity Technologies Asset Store
fBasic Assets 
FImpossible Creations Asset Store
プロトタイピング
入手：
Prototyping Pack | Unity Asset Store [Official]
テスト用環境
入手：
Shader Calibration Scene | Unity Asset Store [Official]
パーティクル
入手：
Unity Particle Pack | Unity Asset Store [Official]
モーション
入手：
Basic Motions FREE Pack | Unity Asset Store [Official]
RPG Character Mecanim Animation Pack FREE | Unity Asset Store [Official]
キャラクターコントローラー
入手：
Third Person Controller – Basic Locomotion FREE | Unity Asset Store [Official]
FPS
入手：
FPS Microgame | Unity Asset Store [Official]
3D プラットフォームゲーム
（3D Game Kit ）
入手：
3D Game Kit | Unity Asset Store [Official]
Environment Pack – 3D Game Kit | Unity Asset Store [Official]
Props Pack – 3D Game Kit | Unity Asset Store [Official]
Character Pack – 3D Game Kit | Unity Asset Store [Official]
ビジュアルスクリプティング
入手：
Bolt | Unity Asset Store [Official]
UI
入手：
UI Samples | Unity Asset Store [Official]
ローポリキャラクター
入手：
Easy Primitive People | Unity Asset Store [Official]
ローポリ環境
入手：
Polygonal Foliage Asset Package | Unity Asset Store [Official]
地形 (Terrain)
動画：
入手：
Terrain Tools Sample Asset Pack | Unity Asset Store [Official]
Free Island Collection | Unity Asset Store [Official]
Realistic Terrain Collection Lite | Unity Asset Store [Official]
Unity Terrain HDRP Demo Scene | Unity Asset Store [Official]
Unity Terrain URP Demo Scene | Unity Asset Store [Official]
参考：
Unity Terrain Demo Scenes – 新しい地形作成ツールを用いて作成された無料デモシーン | CGinterest
Experience the New Unity Terrain Demo Scenes for HDRP and URP | Unity Blog [Official]
3D 環境
入手：
Book Of The Dead: Environment | Unity Asset Store [Official]
Flooded Grounds | Unity Asset Store [Official]
Viking Village URP | Unity Asset Store [Official]
The Realtime Rascals | Unity Asset Store [Official]
樹木／草花
入手：
Dream Forest Tree | Unity Asset Store [Official]
Coconut Palm Tree Pack | Unity Asset Store [Official]
Grass And Flowers Pack 1 | Unity Asset Store [Official]
Grass Flowers Pack Free | Unity Asset Store [Official]
スカイボックス (Skybox)
入手：
HDRI Pack | Unity Asset Store [Official]
All Sky Free – 10 Sky / Skybox Set | Unity Asset Store [Official]
Skybox Series Free | Unity Asset Store [Official]
Classic Skybox | Unity Asset Store [Official]
WorldSkies Free Skybox Pack | Unity Asset Store [Official]
Cloudy Summer Day Skybox | Unity Asset Store [Official]
Cope! Free Skybox Pack | Unity Asset Store [Official]
Streetview Pack | Unity Asset Store [Official]
Starfield Skybox | Unity Asset Store [Official]
Customizable Skybox | Unity Asset Store [Official]
Color Skies | Unity Asset Store [Official]
Skybox Add-on | Unity Asset Store [Official]
銃 (Guns)
入手：
Polygonal Modern Weapons Asset Package | Unity Asset Store [Official]
人体 (Human Body)
入手：
The Heretic: Digital Human | Unity Asset Store [Official]
2D ゲーム
入手：
Pixel Adventure 1 | Unity Asset Store [Official]
2D Handcrafted Art | Unity Asset Store [Official]
Sunny Land Forest | Unity Asset Store [Official]
Dragon Crashers – 2D Sample Project | Unity Asset Store [Official]
テクスチャ
入手：
Outdoor Ground Textures | Unity Asset Store [Official]
マテリアル
入手：
Yughues Free Fabric Materials | Unity Asset Store [Official]
Yughues Free Stone Materials | Unity Asset Store [Official]
手描き風テクスチャ
入手：
Free Stylized PBR Textures Pack | Unity Asset Store [Official]
Hand Painted Stone Texture | Unity Asset Store [Official]
Hand Painted Grass Texture | Unity Asset Store [Official]
Stylized Grass Texture | Unity Asset Store [Official]
Stylize Rock Texture | Unity Asset Store [Official]
Stylized Stones Texture | Unity Asset Store [Official]
Stylize Water Texture | Unity Asset Store [Official]
Stylize Snow Texture | Unity Asset Store [Official]
Stylized Lava Texture | Unity Asset Store [Official]
Stylized Terrain Texture | Unity Asset Store [Official]
Stylized Wood Texture | Unity Asset Store [Official]
Stylize Metal Texture | Unity Asset Store [Official]
Stylized Stone Tile Texture | Unity Asset Store [Official]
Stylize Roof Texture | Unity Asset Store [Official]
Stylized Tile Texture | Unity Asset Store [Official]
Free Game Textures (LowlyPoly) | Unity Asset Store [Official]
VFX
入手：
The Heretic – VFX Character | Unity Asset Store [Official]
Broken Vector
ストア：
Broken Vector | Unity Asset Store [Official]
入手：
Free Low Poly Pack | Unity Asset Store [Official]
Low Poly Tree Pack | Unity Asset Store [Official]
Low Poly Road Pack | Unity Asset Store [Official]
Low Poly Rock Pack | Unity Asset Store [Official]
Ultimate Low Poly Dungeon | Unity Asset Store [Official]
Low Poly Cliff Pack | Unity Asset Store [Official]
Low Poly Fence Pack | Unity Asset Store [Official]