Catapult Quick Reload

In order to use a catapult, you must pick up an explosive barrel with a Bricktron and load it in the catapult, then make the Bricktron operate the catapult. However, after loading an explosive barrel into a catapult, you can make the Bricktron pick up another barrel before operating the catapult. After firing the first barrel, the Bricktron will immediately load the second barrel in, allowing you to fire two barrels consecutively.

Fog of War

There is a fog of war in Castle Story that stops you from seeing enemies outside of your line of sight. Certain objects will dissipate the fog of war and give you vision away from your base. Bricktrons will let you see enemies around them, so you can use them to scout. Archers can see farther than Knights.

Also, captured crystals and shards will grant you vision around them.

Finally, lanterns are easy to build and can be camouflaged near hills and forests, granting you vision and warning you if enemies are approaching your base.