Machine Attacks

Machine Attacks is the only story based gamemode in Team Fortress 2. However, not many know of this gamemode due to the nature of bad English used and the poor level design.

The gamemode is developed by redmyclan with 16 episodes released over 2 years.

Premium Upgrades
Premium Upgrades is a special feature only available on Machine Attacks maps which offer extremely overpowered upgrades for players. This is an upgraded upgrades station for Mann vs Machine which provide a wider variety of upgrades and increasing the maximum level for every upgrade.

This has to be manually downloaded and installed from here.

Characters
Reaper Robots:

Cymanic

Jekete

Bannai

Duvada

Spencer

KrizaUba

Tinkie

Metalgen

Maha

Other Characters:

Rebel Robot Soldier

Rebel Robot Scout

Rebel Robot Sniper

Gray Mann

Announcer

Enemies
Robot Heavy

Robot Scout

Robot Pyro

Robot Engineer

Robot Demoman

Robot Soldier

Robot Medic

Robot Sniper

Robot Spy

Giant Heavy

Major League Scout

Pyro Super Pusher

Giant Rapid Fire Demoman

Giant Soldier

Giant Medic

Giant Unzoom Sniper

Giant Indian Heavy

Black Box Soldier

Samurai Soldier

Advanced Samurai Soldier

Accurately Sniper

Piss Shooter Sniper

Machine Sniper

Elite Heavy

Elite Scout

Elite Pyro

Elite Demoman

Elite Soldier

Elite Sniper

Fire Absorber

Blast Absorber

Bullet Absorber

Crit Absorber

Titan Heavy

Titan Scout

Titan Pyro

Titan Demoman

Titan Soldier

Titan Medic

Titan Sniper

Upgraded Heavy

Upgraded Scout

Upgraded Pyro

Upgraded Demoman

Upgraded Soldier

Upgraded Medic

Upgraded Sniper

Upgraded Spy

Champion

Bloodrinker

Godblesser

NuclearMaster

Chaos

Assassin

Boss: Guardian Demoman

Boss: Giant Backburner Pyro

Bomb Carrier

Reaper Sniper

Luck or Bad

Tiny Heavy

Tiny Scout

Tiny Pyro

Tiny Demoman

Tiny Soldier

Tiny Medic

Tiny Sniper

Tiny Spy

Butcher

Chaos

Chaos Sniper

Critical Medic

Uber Medic

Force a Nature Scout

Iron Heavy

Terroist

Hunter

Firework Man

Flare Pyro

Shotgunner Heavy

Shotgunner Pyro

Sentry Hitter

Piss Thrower

Milkman

Trivia
The developer has been updating the maps to make it more optimized and with the most recent update, updating the premium upgrades feature and a few fixes released under the new name "Machine Attacks Remastered".