Hey, there used to be a source game mod i played back in the 2009-2011ish period which was similar to the now popular game fortnite (in building mechanics at least).
the game would start with teams that would build up forts. i believe the weapon model while building was the tf2 stun stick, but i could be wrong. building would cost resources. once the game went from the initial build stage to combat, you would re-spawn as your desired class. there were all sorts of crazy classes like wizards that could cast spells, or people with guns or swords. you could access plates on the ground which let you spawn different vehicles such as hover bikes or tanks.
also - first post!!!