This game has all sorts of content which makes it a lot of fun.
This game has a wide variety of content, so it's a blast playing it.
この場合、次のように言うと良いですよ。
ーThis game has all sorts of content which makes it a lot of fun.
「このゲームは内容が盛りだくさんですごく楽しい」
all sorts of content で、内容が盛りだくさんなことを言えます。
ーThis game has a wide variety of content, so it's a blast playing it.
「このゲームは内容が盛りだくさんで遊ぶのが楽しい」
a wide variety of content でも内容が盛りだくさんなことを言えます。
ご参考まで！
カナダ 
