@@ -15 +15 @@
-<gloss>game where players must complete monotonous tasks to advance</gloss>
+<gloss>game in which players must complete monotonous tasks to advance</gloss>

Interesting. Can't think of any changes that would improve it.

https://en.wikipedia.org/wiki/Grinding_(video_games)
(No japanese xref)

What is the word or set-phrases of "grinding/grindy gameplay" as opposed to "power-leveling" in formal/informal Japanese
https://japanese.stackexchange.com/questions/61206/what-is-the-word-or-set-phrases-of-grinding-grindy-gameplay-as-opposed-to-pow
Answer:
I think what you are looking for is 作業感の強いゲーム (formal) or 作業ゲー (slang).
In gaming contexts, 作業 (literally "task") is a common word which refers to that repetitive and boring work such as defeating the same enemy many times to level up. 作業 is basically a negative word in this context, and many people dislike it. But there are popular games whose main enjoyment is 作業 itself, so 作業 is not 100% negative. For example, Cookie Clicker is a typical 作業ゲー but is loved by many people.

For copious examples, search:
"作業ゲー" "ff14"

(ff14 = final fantasy 14, a video game title.  Plenty of other titles would work).

https://www.wordreference.com/enja/grinding
grinding n	(gaming: repeating tasks for advantage) (俗語)	作業ゲー 名

A whole article, but I've pasted the executive summary:
https://dic.nicovideo.jp/a/作業ゲー
作業ゲーとは、プレイ中に実のない行為を繰り返せざるをえないことが多いゲームを指して使われる言葉である。

https://keradgames.com/column/game_yougoshu/作業ゲー/
作業ゲーとは、同じことを何度も繰り返す必要のあるゲームのことを指しています。

Negative video game review:
https://steamcommunity.com/app/394310/negativereviews/?l=japanese&browsefilter=toprated&snr=1_5_9_
こんなことなら経験値の上昇量を3分の1にでもしてくれたほうがいいし表現的にもリアルでもなんでもなくゲーム側が用意する理不尽でしかない一応中盤くらいまで行けばファイトマネーのおかげで成長は軌道に乗るがそこまではだるすぎるしそこに到達してからは完全に作業ゲーと化すというあほバランス

作業ゲー	4248	63.7%
作業ゲーム	2423	36.3%

You'll probably have thoughts on wording, but I ask that you include the word "grinding", preferably as a gerund.

"grinding" is the closest English analogy(a very good one).  A game which requires grinding is one where you have to repeatedly fight mindless battles in order to "level up" your character in order to be strong enough to progress.  There is no English word for "a game the requires grinding" that I am aware of, and I haven't found a Japanese word for the act of "grinding" outside of classifying the whole game as a 作業ゲー.  So translation will always require some finesse.

See 死にゲー for another entry with a necessarily verbose gloss.

This is clearly more popular than 作業ゲーム, so I wouldn't xref.  But 作業ゲーム definitely exists, so it should probably be in here.  I will propose it as well...