What Is the Last Level of "N Game"? Clarification Needed

"N Game" is ambiguous. Please specify which game you mean:

• N (2004) — The free Flash/PC platformer by Metanet Software (later N+, N++). Final level: Episode 5, Level 5: "The End" (or user levels).
• N+ (XBLA/DS/PSP) — Episode 55, Level 5: "The End."
• N++ (Steam/PS4/Switch/Xbox One) — Legacy Episode 55, Level 5: "The End" + thousands of user levels.
• Nintendo "N" codename? — Could refer to Nintendo 64 (Project Reality), GameCube (Dolphin), Switch (NX).
• Other "N" titles: Ni no Kuni, No Man's Sky, Nier, Nioh, Naruto games, etc.

Reply with the full title or platform, and I'll describe the final level in detail.