tā shuō zìjǐ wán yóuxì bú shì wèile yíng, érshì wèile gēn péngyou yìqǐ wán de hěn gāoxìng.

自己 means oneself / oneself personally, and here it refers back to 她.

So:

• 她说自己玩游戏... = She said that she plays games...
• 自己 helps show that the person doing the gaming is the same person as the person speaking.

Why not just use 她?

• 她说她玩游戏... is possible, but in some contexts it can sound a little less clear, because the second 她 could sometimes be interpreted as someone else, depending on context.
• 自己 strongly points back to the subject of the main clause.

Why not 她自己?

• 她自己 adds emphasis: she herself
• That would sound more marked, as if you want to stress she herself rather than someone else.

So in this sentence, 自己 is a natural way to say she herself / she personally without sounding overly emphatic.

This is a very common contrast pattern:

• 不是为了 A，而是为了 B
• not for A, but for B

In this sentence:

• 不是为了赢，而是为了跟朋友一起玩得很高兴
• not in order to win, but in order to have a great time playing with friends

This structure is used when correcting or contrasting motivation, purpose, or identity.

A few similar examples:

• 我学中文不是为了考试，而是为了工作。
  I’m not learning Chinese for exams, but for work.

• 他来北京不是为了旅游，而是为了见朋友。
  He didn’t come to Beijing for sightseeing, but to see friends.

So here the speaker is contrasting two reasons for playing games:

1. winning
2. having fun with friends

为了 means for the sake of, in order to, or for the purpose of.

In this sentence, it introduces a purpose:

• 为了赢 = in order to win
• 为了跟朋友一起玩得很高兴 = in order to have a great time playing with friends

It is more explicit than simply putting two verbs next to each other. It clearly marks purpose.

Compare:

• 我来中国学中文。
  I came to China to study Chinese.

• 我为了学中文来中国。
  I came to China in order to study Chinese.

Both can work, but 为了 puts extra focus on the purpose.

The underlying word is 不 pronounced bù, but its tone changes before another fourth-tone syllable.

Since 是 is fourth tone (shì), 不 changes from fourth tone to second tone:

• 不 + 是 → bú shì

This is a pronunciation rule, not a change in meaning.

Examples:

• 不是 → bú shì
• 不要 → bú yào
• 不会 → bú huì

But if the next syllable is not fourth tone, it usually stays bù:

• 不好 → often pronounced bù hǎo
• 不来 → bù lái

Because the sentence talks about playing games in general, and then more specifically about playing together happily.

The two parts are doing different jobs:

1. 自己玩游戏
   This states the activity: she plays games

2. 跟朋友一起玩得很高兴
   This describes the experience/result of playing: play with friends and have a great time

So the first 玩 belongs to 玩游戏 = play games.
The second 玩 belongs to 玩得很高兴 = play and be very happy / have fun playing.

This repetition is completely natural in Chinese.

This is a verb + 得 + complement structure.

Pattern:

• verb + 得 + adjective / description

It shows how an action is done or what result/state comes from doing it.

So:

• 玩得很高兴
• literally: play to the extent of being very happy
• naturally: have a great time playing / play very happily

Other examples:

• 他说得很快。
  He speaks very fast.

• 你写得很好。
  You write very well.

• 孩子们玩得很开心。
  The children had a lot of fun playing.

Here, 高兴 describes the emotional state during or resulting from the playing.

Yes, very often it could.

• 玩得很高兴
• 玩得很开心

Both are natural and both mean something like have a great time.

A small nuance:

• 高兴 often emphasizes feeling glad / pleased / happy
• 开心 often feels a bit more everyday and can emphasize having fun / being cheerful

In many casual contexts, they are interchangeable.

So:

• 跟朋友一起玩得很高兴
• 跟朋友一起玩得很开心

Both sound good.

Yes, 很 literally means very, but in Chinese it often appears before adjectives even when English would not say very.

In this sentence:

• 玩得很高兴

It can mean:

• play very happily
• have a great time

If you said just 玩得高兴, it is not impossible, but 很 makes it sound more natural and smooth in many contexts.

This is a common feature of Chinese adjectives:

• 我很忙。 = I’m busy.
• 她很高兴。 = She’s happy.

Sometimes 很 is truly emphatic (very), and sometimes it is just the normal way to link the subject and adjective.

跟朋友一起 means together with friends.

Breakdown:

• 跟 = with
• 朋友 = friends
• 一起 = together

So:

• 跟朋友一起玩 = play together with friends

You can also say:

• 和朋友一起玩

Here 跟 and 和 both mean with, and both are common.

Examples:

• 我跟家人一起吃饭。
  I eat with my family.

• 她和同学一起去学校。
  She goes to school with her classmates.

In Chinese, the object can be omitted if it is obvious from context.

Here the context is playing games, so 赢 naturally means:

• win the game
• win matches
• come out on top

Chinese often leaves out things that English might spell out.

So:

• 为了赢 = in order to win

If you wanted to be more explicit, you could say:

• 为了赢游戏
• 为了赢比赛

But in this sentence, just 赢 is perfectly natural because the context already tells us what she wants to win.

Here 说 is best understood as said that.

The structure is:

• 她说 + clause
• She said + clause

So:

• 她说自己玩游戏不是为了赢...
• She said that she doesn’t play games in order to win...

In Chinese, that is often omitted after verbs like 说, 觉得, 知道, etc.

Compare:

• 他说他很忙。
  He said (that) he is busy.

• 我觉得这个很好。
  I think (that) this is good.

So 说 here introduces reported speech or a reported statement.

Yes.

玩游戏 is broad and can mean:

• play games in general
• play video games
• play a game

The exact meaning depends on context.

For example:

• If people are talking about mobile apps or consoles, 玩游戏 probably means play video games.
• If people are talking about a party, classroom, or children, it may just mean play games more generally.

If you want to be more specific, you can say:

• 玩电子游戏 = play video games
• 打游戏 = play video games, very common in spoken Mandarin

But 玩游戏 is perfectly natural here.

A useful way to see it is:

• 她说
  she said

• 自己玩游戏
  that she plays games

• 不是为了赢
  not in order to win

• 而是为了跟朋友一起玩得很高兴
  but rather in order to have a great time playing with friends

So the whole structure is:

[Main clause] + [what she said] + [contrast of purpose]

More abstractly:

• 她说 + 自己 + V + 不是为了 A，而是为了 B

This is a very useful pattern to learn because you can reuse it easily:

• 我学英语不是为了考试，而是为了交流。
  I’m not learning English for exams, but for communication.

• 他工作不是为了钱，而是为了理想。
  He works not for money, but for his ideals.

It can suggest both, but the most natural English translation is usually:

• have a great time playing with friends
• enjoy playing with friends

Literally, it is close to:

• play with friends together and be very happy

But in natural English, we usually express that as:

• have fun playing with friends
• have a great time with friends

So yes, it includes the idea of playing happily, but the overall feeling is more like the purpose is enjoyment and shared fun, not just the manner of playing.

Yes. Native speakers often shorten or simplify sentences when the context is clear.

For example:

• 她说她玩游戏不是为了赢，是为了跟朋友一起开心。
• 她说她玩游戏不是想赢，就是想跟朋友一起玩得开心。

These are more conversational.

The original sentence is already natural, but it is a bit fuller and clearer in structure:

• 不是为了……而是为了……

That pattern is especially good for learners because it clearly shows the contrast.