Let me proceed step by step, making sure each word is replaced with three synonyms, proper nouns left as is, and using the y format. I'll have to check for consistency and accuracy to ensure the synonyms make sense in context. For example, "Leaderboards and Challenges" could be Standings and Competitions.

This should cover all the requirements the user has specified.

But the user also said to output text only, so maybe they don't want explanations. Just the replacements.

"Endless Moto Mode" is a proper noun from the context since it's the name of a game mode. Wait, but the user said to leave proper nouns as is, but actually, the example given in previous interactions shows that they wanted proper nouns to stay. However, the instruction says Proper nouns stay. So I should leave Ghostrunner 2 and Endless Moto Mode unchanged. Wait, but in the previous example, they replaced "Brand" but kept the actual name as is. Hmm, need to confirm. The user's instruction says to swap every word with 3 synonyms except proper nouns. So Ghostrunner 2 and Endless Moto Mode should stay as they are.