Length Warning
Check out the capture-the-flag tag, it should help a lot 
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I wouldn’t recommend sharing private information here such as your, you should probably edit it out.
Maybe a place to forge and craft items/weapons into new items/weapons?
You could also add NPCs and customize them!
(🟧) How to make a talking and trading sentry
Custom Boss | Difficulty 2/10 🟩
Cool ways to decorate your Custom Bosses(wiki)
Here are some more specific capture-the-flag guides and related topics that might help:
I need help with tagging - #2 by Alan_Shen
Timed Tag Zone For CTF - #2 by Alan_Shen
Making Multiple Speed Upgrades! | TUTORIAL | Difficulty: 🟩
How to make an Endurance Upgrade | Difficulty 3/10 or 🟩
How to make the Energy Per Question Upgrade for Capture the Flag
The Ultimate Capture the Flag guide
How to make scores in Capture the Flag 🟩
How to make buyable barriers - Credit to @Max-Grass
How to make Buildable Barriers (Like in Capture the Flag)
Welcome to the forum @Dragon1!