Singleplayer
Singleplayer is one of the major modes of Mega Man 8-Bit Deathmatch, where the player progresses through most of the game's map selection with a unique story, hub maps and boss fights.
Story
v1's Intro Cutscene
Initial Plot
The story of 'Mega Man 8-Bit Deathmatch' starts one year after the events of Mega Man 6.
After Mega Man defeated Dr. Wily for the 6th time, the real Mr. X was found and rescued. In celebration of his heroic efforts, Mr. X hosted the Second Annual Robot Master Tournament with new rules, arenas, and security measures so . With permission from Dr. Light, each robot would have to be reprogrammed use the weapon-swapping abilities of Mega Man to keep the competition fair.
During the final announcement of the tournament, the broadcast is interrupted by none other than Dr. Wily, who praises the tournament, and announces that he'll be entering all of his Robot Masters to prove his genius and superiority in robotics to Dr. Light. There are no leads on where Dr. Wily could be hiding, or what he could be plotting.
Recently, a unknown robot (named Maestro by default) has taken residence in the Light household, and plans on joining the tournament in Dr. Light's name. Mega Man and the Light Numbers also register as participants in the tournament to ensure Dr. Wily doesn't have anything hidden up his sleeves...
In-Game
The player starts in Dr. Light's Lab where Dr. Light briefly explains the situation and how to configure their controls. The player character is then allowed to check the mail, interact with NPCs, change their skin, test out weapons in the Training Room, or head to one of the numerous maps.
Chapters
The game is split up into thirteen chapters as of Version 6, each themed a respective game in the Mega Man series.
| Chapter | Game | Gamemode | Mapset | Boss | Secret Boss |
|---|---|---|---|---|---|
| Chapter 1: | 
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Deathmatch |   
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 Mega Man? Yellow Devil
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| Chapter 2: | 
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Deathmatch |   
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 Guts Dozer
|
 Enker
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| Chapter 3: | 
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Deathmatch |   
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 Mega Man? Doc Robots
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| Chapter 4: | 
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Deathmatch |   
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 Met Catcher& Metool Daddy |
 Punk
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| Chapter 5: | 
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Deathmatch |   
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 Mega Man? Dark Man
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| Chapter 6: | 
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Deathmatch |   
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 ReprogrammedRobot Masters  Gamma
|
 Ballade
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| Chapter 7: | 
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Deathmatch |   
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 Bass
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 Wily Capsule
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| Chapter 8: | 
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Deathmatch |   
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 Duo Evil Energy Robot
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| Chapter 9: | 
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Team Deathmatch |   
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 King
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| Chapter 10: | 
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Team Deathmatch |   
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Buster Rod G. Mega Water S. Hyper Storm H. Genesis Unit
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| Chapter 11: | 
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Deathmatch & Team Deathmatch |
  
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 Proto Man Mega Mech Shark
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 Police Chase Fake Man Quint
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| Chapter 12: | 
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Roboenza Deathmatch |   
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 Weapon Archives Wily Iron Golem
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| Chapter 13 | 
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One-Life Marathon |   
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 Terra Sunstar Beta Eclipse Eclipse
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 Ra Moon
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Boss Rush Mode
Prior to v3a, upon beating the game, a new mode is unlocked called Boss Rush mode. In this mode the player simply fought nearly all the bosses in the game without having to go through each chapter, save for Enker, Punk, Ballade and Wily Capsule. After beating all the bosses, the game's ending plays as if you beat Chapter 6. Boss Rush can be found in Auto's section of the lab.
This feature was removed in v3a, presumably because of the redesigned save feature allowing the player to jump to any point reached in the campaign, including bosses. The functionality is still in the game, however — by typing "set secret_bossrush 1" into the console before entering a boss level, the game will automatically move on to the next boss. As of v4a, all bosses after Chapter 6 are accounted for, including Duo, Buster Rod G, Mega Water S, and Hyper Storm H.
The feature returns in V5, renamed to Boss Attack. After Plug Man returns to Light Labs, and all chapters are beaten, Plug Man allows you to attempt Boss Attack. In this mode the player is given three tries to beat the following bosses back to back:
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