Spelet är så pass lätt att förloraren vill spela igen.

In this sentence, så pass is a degree expression. It means something like:

• to such an extent
• that
• so / enough

So Spelet är så pass lätt att ... means:

• The game is easy enough that ...
• or more literally, The game is so easy that ...

Compared with plain så, så pass can sound a little more measured or specific, as if you are saying easy to that degree.

A few rough comparisons:

• Det är så lätt att alla klarar det. = It is so easy that everyone can do it.
• Det är så pass lätt att alla klarar det. = It is easy enough / so easy that everyone can do it.

Both work, but så pass often feels slightly more nuanced.

Spelet is the definite form of spel.

• ett spel = a game
• spelet = the game

The ending -et is the definite article for many ett-words.

So:

• spel = game
• spelet = the game

Here, the sentence is talking about a specific game, so Swedish uses spelet.

Lätt is the adjective lätt meaning easy.

It appears as lätt here because it agrees with spelet, which is an ett-word:

• en lätt bok = an easy book
• ett lätt spel = an easy game

Since the sentence says Spelet är ... lätt, the adjective stays in the ett-form: lätt.

This is true even when the adjective comes after the verb är:

• Boken är lätt.
• Spelet är lätt.

Here, att does not mean the infinitive marker to. Instead, it introduces a clause meaning that.

The structure is:

• så pass + adjective + att + clause

So:

• så pass lätt att förloraren vill spela igen
• so easy that the loser wants to play again

This att connects the result to the first part of the sentence:

• the game is easy
• to such a degree that even the loser wants to play again

So this is a result clause.

Because vill is a modal verb, and in Swedish modal verbs are normally followed by the infinitive without att.

So:

• vill spela = wants to play
• not vill att spela

This is the same pattern as with other modal verbs:

• kan spela = can play
• ska spela = will / is going to play
• måste spela = must play
• vill spela = wants to play

So in the sentence:

• förloraren vill spela igen
• the loser wants to play again

Förloraren means the loser.

Forms:

• en förlorare = a loser
• förloraren = the loser

Here, Swedish uses the definite form because it refers to the losing person in the game. Even if the meaning is general, Swedish often uses the definite form for a role that is understood from the context.

So förloraren here means:

• the loser
• that is, the person who loses the game

It does not necessarily mean a specific named person already mentioned earlier; it can simply mean whoever loses.

Igen means again.

So:

• spela igen = play again

This is the normal way to say that someone wants another round or wants to repeat the activity.

Examples:

• Kan vi ses igen? = Can we meet again?
• Jag vill läsa den igen. = I want to read it again.
• Han vill spela igen. = He wants to play again.

In this sentence, it shows that even the person who loses still wants another game.

Sometimes, yes, but spela igen is the most straightforward choice here.

• spela igen = play again
• spela om can mean play again / replay / do over, but it can have a slightly different feel depending on context

For a simple meaning like want to play another round, spela igen is very natural.

So in this sentence, spela igen is exactly what a learner would expect for play again.

The sentence breaks down like this:

• Spelet = the game
• är = is
• så pass lätt = easy enough / so easy
• att = that
• förloraren = the loser
• vill spela igen = wants to play again

So the overall pattern is:

• X är så pass + adjective + att + clause
• X is so / enough + adjective + that + clause

This is a very useful Swedish pattern.

Examples:

• Boken är så pass bra att jag vill läsa den igen.

• The book is so good that I want to read it again.

• Maten var så pass god att alla tog mer.
• The food was so good that everyone took more.

Yes. The word order in att förloraren vill spela igen is normal.

Swedish subordinate clauses often have a different word order from main clauses, especially when there is an adverb like inte. In this sentence, there is no such adverb, so the clause looks straightforward:

• förloraren vill spela igen

If you add inte, you can see the subordinate-clause pattern more clearly:

• ... att förloraren inte vill spela igen
• ... that the loser does not want to play again

Notice that inte comes before the verb vill in the subordinate clause. That is standard Swedish subordinate word order.

Yes. It sounds natural and idiomatic.

It expresses a nice idea: the game is so easy, friendly, or enjoyable that even the person who loses still wants to continue.

The phrase så pass ... att ... is a normal and useful construction, and the rest of the sentence is also standard Swedish.

A very close English rendering would be:

• The game is easy enough that the loser wants to play again.

or

• The game is so easy that even the loser wants to play again.

The exact English wording may vary, but the Swedish itself is perfectly natural.