kyouryokugatageemu ka taisengatageemu ka ni yotte, syourizyouken to settoappu ga tigau.

Because this pattern means depending on whether it is A or B.

• A か B か = whether A or B
• Then によって adds the meaning depending on

So:

• 協力型ゲームか対戦型ゲームか = whether it is a cooperative game or a competitive game
• 協力型ゲームか対戦型ゲームかによって = depending on whether it is a cooperative game or a competitive game

The second か is important because it helps turn the whole choice into something like which one it is / whether it is one or the other.

Here, によって means depending on or according to.

In this sentence, it shows that the next part changes based on the type of game.

A very natural breakdown is:

• X によって、Y が違う
• Y differs depending on X

So here:

• 協力型ゲームか対戦型ゲームかによって、勝利条件とセットアップが違う。
• The victory conditions and setup differ depending on whether it is a cooperative or competitive game.

Because that would sound incomplete or unnatural for this meaning.

The sentence is not just listing two nouns. It is expressing the category the game falls into: cooperative or competitive. The pattern A か B か packages that whole choice together.

So:

• A か B かによって = depending on whether it is A or B

Without the second か, the sentence loses that clear whether A or B structure.

型 means type, style, or format.

So:

• 協力型ゲーム = cooperative-type game
• 対戦型ゲーム = competitive/head-to-head type game

In natural English, you would usually just say:

• cooperative game
• competitive game or versus game

In Japanese, 型 is common when classifying things by style or system.

More or less, yes, in this context.

• 対戦 literally suggests facing off against an opponent
• So 対戦型ゲーム often means a game where players compete directly against each other

Depending on the context, it can feel more specifically like:

• head-to-head game
• versus game
• competitive game

So competitive game is a good general translation, but the Japanese has a slightly stronger sense of direct opposition.

Because が marks the things that are different.

The structure is:

• A が違う = A is different
• A と B が違う = A and B are different

So here:

• 勝利条件とセットアップが違う
• the victory conditions and setup are different

You could use は in some contexts for contrast, but が is the normal neutral choice when identifying what differs.

Japanese verbs do not change for singular or plural.

So whether the subject is one thing or many things, the verb stays the same:

• 条件が違う
• 条件とセットアップが違う

In English, we would say are different, but in Japanese 違う does not change.

It is a compound noun:

• 勝利 = victory
• 条件 = conditions

Together:

• 勝利条件 = victory conditions or win conditions

This is a very common kind of Japanese compound, where two nouns combine into one more specific noun.

Because it is a loanword from English: setup.

Katakana is often used for:

• foreign loanwords
• technical terms
• game-related vocabulary
• words used with a modern or specialized feel

In gaming contexts, セットアップ usually means the initial arrangement or preparation before play begins.

Yes, in a sense there is an implied idea like:

• whether it is a cooperative game or a competitive game
• which of the two it is

Japanese often leaves that unstated because the structure already makes it clear.

A more expanded version might look like:

• 協力型ゲームか対戦型ゲームかによって
• depending on whether the game is a cooperative game or a competitive game

So nothing is actually wrong or incomplete; Japanese simply allows this kind of compact phrasing.

Because Japanese often omits information that is understood from context.

If the topic is already known, the sentence does not need to say:

• このゲームは
• そのゲームは
• ルールは

It can simply say:

• 協力型ゲームか対戦型ゲームかによって、勝利条件とセットアップが違う。

The listener understands that this is talking about the game or the game rules being discussed.

Yes, but the nuance would change slightly.

For example:

• 協力型ゲームなら、勝利条件とセットアップが違う。
• If it is a cooperative game, the victory conditions and setup are different.

But that only talks about one side unless you add the other side too.

Or:

• 協力型ゲームの場合と対戦型ゲームの場合では、勝利条件とセットアップが違う。
• In the case of cooperative games and in the case of competitive games, the victory conditions and setup are different.

That version is more explicit, but also heavier.

The original A か B かによって is compact and natural for depending on whether it is A or B.

The sentence follows this pattern:

• A か B かによって、C が違う。
• C differs depending on whether it is A or B.

Applied here:

• A = 協力型ゲーム
• B = 対戦型ゲーム
• C = 勝利条件とセットアップ

So the full structure is:

• Depending on whether it is a cooperative game or a competitive game, the victory conditions and setup differ.

This is a very useful pattern you can reuse in many situations.