https://store.steampowered.com/eula/2623190_eula_0

Section 3D

3. LIMITATIONS AND RESTRICTIONS. Certain features of the Game are a Service offered by ZeniMax and may only be downloaded online. In such cases, an Internet connection (which is not supplied by ZeniMax) is required to access these features. You are responsible for all costs and expenses associated with acquiring any hardware, software (e.g., Internet browsers), or other products or services required to play the Game. In addition to the restrictions, conditions, and limitations set forth in the ZeniMax Terms of Service and the ZeniMax Code of Conduct, the license granted to you in this EULA is subject to the conditions, restrictions, and limitations set forth in Section 1 and this Section 3 of this EULA (collectively, the “License Limitations”). Any use of the Game in violation of the License Limitations will be regarded as an infringement of ZeniMax’s copyrights in and to the Game and will be a breach of this Agreement. You agree that you will not and will not assist any other person, under any circumstances, to:
   D. use cheats, automation software (bots), hacks, mods, or any other unauthorized third-party software designed to modify the Game or adversely impact any other persons playing of the Game or their experience of playing the Game