If you are looking for the "paper" to replace a damaged case, this is called the . Standard Dimensions: ~273mm x 183mm (PS4/Xbox One).
Since most modern games (MXGP3 was released in 2017) do not include thick instruction booklets, the "paper" usually refers to one of the following: 1. Digital Manual Leaflet MXGP3 – The Official Motocross Videogame
If you are looking for an academic regarding the game: If you are looking for the "paper" to
Some regional releases included a small paper slip showing the : Throttle/Brake: RT/LT (Xbox) or R2/L2 (PS4). Clutch: LB (Xbox) or L1 (PS4). MXGP3 – The Official Motocross Videogame
Right Analog Stick (Crucial for MXGP3’s physics engine). 4. Technical Paper / Research
Often contains the Product Key (for PC) or legal/safety warnings. 2. Retail Cover Art (The Inlay)