
After character creation, the player arrives to Nevada Central via bus. The game begins with character creation, the player creates their character based on several origins which apply gameplay modifiers. The story of Arena combat appears to take place in the past, potentially before the events of Project Nexus Classic Episode 1.5. There is also a shop system in the game, allowing the player to purchase weapons, armor, and weapon modifications at the cost of money they've earned during their time in the arena. The player will frequently find themselves playing the same arenas multiple times in order to adequately level up their skills to progress to the next arena. Killing enemies with fists grants unarmed EXP, killing enemies with melee weapons grants melee EXP, and so forth. The player can level up each skill tree by using the required gameplay style. Each experience pool pertains to a skill tree. The game has an entire RPG-esque leveling system, with several experience pools. The goal of Arena Mode is to level up your character and make them stronger, all while gaining money, experience, and new arenas to fight in. Gameplay normally starts very slow, with the player having very few skills and this being largely inept in combat.

The gameplay of arena mode varies differently depending on what Origin the player chooses. As the player progresses, they unlock more of the story as well as more arenas to fight in, items, skills, and features for the Headquarters. This game mode is centered around building your character from nothing, starting at extremely low level and leveling up slowly as they progress and fight more enemies. The player character arrives on a bus to Nevada Central, a city in the farther reaches of the Nevada wasteland.


