Reviewers discontented with inclusion of mild censor's classification for certain fantasy video-games (4)

'mild censor's classification for certain fantasy video-games' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'reviewers discontented with inclusion' is the wordplay.
'discontented' says to hollow out the word (remove centre letters) (the word's contents are removed).
'with' means one lot of letters goes inside another.
'inclusion' becomes 'pg' (I can't justify this - if you can you should give a lot more credence to this answer).
'reviewers' with its middle removed is 'rs'.
'rs' placed around 'pg' is 'RPGS'.

'of' acts as a link.

Can you help me to learn more?