Minden tag játszik.

Because minden means every or each, and in Hungarian it is normally followed by a singular noun.

So Hungarian says:

• minden tag = every member
• not minden tagok

This is one of the most important differences from English. English often uses all + plural, but Hungarian commonly uses minden + singular.

So:

• Minden tag játszik. = Every member plays.

The verb is singular because the subject is grammatically singular: minden tag = every member.

Even though the idea refers to many people, Hungarian treats minden tag as a singular expression, so the verb also stays singular:

• Minden tag játszik. = Every member plays.

Compare that with a true plural subject:

• A tagok játszanak. = The members are playing / play.

So:

• minden tag → singular verb
• a tagok → plural verb

It most directly means every or each.

In many situations, English might translate it more naturally as all, but grammatically Hungarian is still using the every/each pattern:

• minden ember = every person
• minden nap = every day
• minden tag = every member

So if you see minden + singular noun, think every/each first.

Because minden itself already determines the noun, so you do not use an article before the noun in this structure.

Correct:

• minden tag

Not:

• a minden tag

This is similar to English: we say every member, not the every member.

Tag means member, usually a member of a group, club, organization, team, and so on.

Examples:

• a klub tagja = the member of the club
• minden tag = every member

English speakers may notice it looks like the English word tag, but here it is a completely different Hungarian word.

Yes, here játszik means plays.

The basic verb játszik can mean:

• to play a game
• to play in general
• to act / perform
• sometimes to play an instrument, depending on context

In this sentence, without extra context, játszik simply means plays or is playing.

Hungarian present tense can often correspond to either:

• simple present: plays
• present continuous: is playing

So Minden tag játszik could mean:

• Every member plays
• Every member is playing

The wider context decides which is more natural.

Hungarian usually does not need a separate subject pronoun, because the verb ending already gives person and number information.

Here, játszik is a third person singular form. The subject is also explicitly stated as minden tag, so adding a pronoun would be unnecessary.

Hungarian often works like this:

• A fiú játszik. = The boy is playing.
• Minden tag játszik. = Every member plays.

Pronouns such as ő are mainly used for emphasis or contrast.

Yes, Hungarian word order is flexible, but changes usually affect focus or emphasis.

The neutral order here is:

• Minden tag játszik.

This is the most straightforward way to say Every member plays.

If you changed the order, it could sound marked or emphasize a different part of the sentence. For a beginner, it is best to learn this version as the normal neutral pattern:

• subject + verb

It is the indefinite conjugation.

Hungarian verbs can use two main conjugation patterns:

• indefinite
• definite

You use the definite conjugation when the verb has a specific definite object.

Here there is no object at all, so Hungarian uses the indefinite form:

• játszik = he/she plays

For example:

• A gyerek játszik. = The child is playing.
• no object → indefinite form

This is a useful grammar point, even though in this sentence you do not need to translate it separately.

A rough pronunciation is:

• Minden ≈ MIN-den
• tag ≈ tog (with a short Hungarian a, not English tag)
• játszik ≈ yaat-sik

A few helpful sound notes:

• j sounds like English y
• á is a long vowel
• sz sounds like English s
• tsz in játszik may feel unusual at first, but it is normal in Hungarian pronunciation

So the whole sentence is roughly:

• MIN-den tog YAAT-sik

Yes. Az összes tag játszik also means All the members are playing / Every member plays.

There is a nuance:

• minden tag = every member
• az összes tag = all the members

Both can be natural, but minden tag focuses more on each individual member, while az összes tag sounds more like the whole group taken together.

So your original sentence is perfectly correct, and it is a very common way to express this idea.