Based on what you said, these are not required for you to do your job, only for you to improve your position. It is not unreasonable for you to use personal time for self-improvement. It’s also not unreasonable for you to use company downtime for self-improvement.
Seconding Dying Light 1 and Borderlands 2. Excellent games! If you’re open to 3rd person, Helldivers 2 and The Division 2. No idea about DRM, though.