load into the menu
press the tilde key / ` this key
a menu will popup
put devmode in to the console
go into any level
open the pause menu
click the dev button
click give all weapons / secret weapons / church weapons

you can do a lot in the dev menu
⚫noclip
⚫refill ammo
⚫all weapon mods
⚫reset every thing
⚫reset achievements
and other stuff

now you have them all
go get em tiger
pls like if you liked it
and ya cool