Boot Camp (Mann vs. Machine)
Boot Camp is the official version of the Mann vs. Machine game mode that is functionally identical to Mann Up besides not allowing players to receive items upon finishing a mission. Any player is free to play Boot Camp without the need of a Tour of Duty Ticket. Unlike Mann Up, players can host their own Boot Camp servers to play privately with friends at the expense of not receiving items for completing missions.
Due to the item drop restrictions placed on Boot Camp, it is not possible to receive Mann vs. Machine-exclusive rewards such as Botkiller weapons and Australium weapons. In order to acquire these, one must complete a Tour of Duty in Mann Up.
It is recommended that players who are new to Mann vs. Machine play Boot Camp before heading into Mann Up to avoid making common mistakes.
There are currently 5 difficulties available in Boot Camp: Beginner, Intermediate, Advanced, Expert, and Nightmare.
Since Boot Camp is not hosted on official Valve servers, community servers host Boot Camp games instead. While playing on a community server, do not be alerted if you notice modifications to Mann vs. Machine, such as infinite credits, as this is commonplace on many community Mann vs. Machine servers for the benefit of the player, such as ease of access to upgrades.