: To unlock these skills for free, players must increase a character's Mastery Level to Level 2 .

While there is no official academic "paper" published under the title , this title appears to refer to a specific chapter of a walkthrough guide for the video game Demon Slayer (Kimetsu no Yaiba), popularized by content creators like SOCIGAMES .

I can then help you locate the exact manual or walkthrough you need. Social gaming: A systematic review - ScienceDirect.com

: This section explains how to unlock a character's second ultimate attack without spending 1,000 Kametsu points in the shop.

If you'd like to find a of a specific game guide:

If you were looking for a formal research paper on "Social Gaming" rather than a game guide, you might be interested in Social Gaming: A Systematic Review , which also contains a Section 3.1 regarding research methodologies in the gaming industry.

: The guide recommends playing online matches to gain experience faster. For example, using characters like Tengen or Inosuke in online play can quickly reach the required level to unlock skills such as "Fourth Fang: Slash and Slice".

: Creators often include tutorials on using controllers on PC for better precision during these mastery-grinding sessions.