Can be done Solo
Open the command console: ESC > Gear Icon > Under the keyboard tab select Advanced > Check off Enable Developer Console
Press the ` button to open the console and type:
map cp_foundry; hostname "boost"; sv_lan 0; sv_cheats 0;
Put yourself On the Red Team. Use any of the following Commands as needed. They must be used as shown. Don't input the []:
sv_gravity [Enter number here, 800 is default]; - Changes the gravity
mp_idlemaxtime 0; - Turns off Idle players idle time limit
mp_idledealmethod 0; - Stops players from being kicked from game
mp_teams_unbalance_limit 0; - This Lets you stack one team
sv_cheats 1; noclip; sv_cheats 0; - Allows you to go through walls and kill bots in their spawn
sv_cheats 1; nav_gen; sv_cheats 0; - Generates Bot movements. Must kick bots and add
them if you run this command for it to take affect.
tf_bot_force_class [Enter Class here] - Will force the next bot to spawn as that class
tf_bot_add [Enter number of bots] [Enter Team Red\Blue]
tf_bot_melee_only [Enter 1 to turn on, 0 to turn off]
tf_bot_kick [Enter bot name in "" or all to boot all of them]
This is a Foundry Pack Achievement
Select Engineer. Capture the first two points. Leave the final point uncaptured. Create a teleporter from the 2nd last point to right in front of the final point. Head back and go through the teleporter and capture the final point immediately. As a backup plan you can always use a dummy account as a engineer and make yourself a scout but it should work solo