Kaiju
Skeletron
Well, after a month of forgetting what I was going to suggest, I remembered.
If it was even possible, I think there should be an incentive to create different types of doors, like the lead/iron ones. Currently, they get opened in a few hits by zombies just like their wooden counterparts. Instead of them basically being for decoration, why not make them defensive?
Wooden door changes:
-Since they're made out of a weaker material, they break when opened by zombies/whatever.
-Possibly repairable by some tool, instead of being disposable
Iron/Lead doors:
-Take much longer to be knocked open by zombies, but can be opened quicker by hard mode mobs
-They do break, but take many more openings than wooden doors
-Due to bonuses, they would cost more to build than before
New: Bunker Door
-Created with Titanium
-Can not be opened by basic mobs, only by hardmode/invasion enemies, but it still takes some time.
-Unbreakable
New: Trap Door
-Made with wood
-Can not be opened by enemies, but can only be placed horizontally
New: Iron/Lead Hatch
-The same as the trap door, the only change is visual
I don't know how much work this would be, but it would be an interesting addition to the game.
If it was even possible, I think there should be an incentive to create different types of doors, like the lead/iron ones. Currently, they get opened in a few hits by zombies just like their wooden counterparts. Instead of them basically being for decoration, why not make them defensive?
Wooden door changes:
-Since they're made out of a weaker material, they break when opened by zombies/whatever.
-Possibly repairable by some tool, instead of being disposable
Iron/Lead doors:
-Take much longer to be knocked open by zombies, but can be opened quicker by hard mode mobs
-They do break, but take many more openings than wooden doors
-Due to bonuses, they would cost more to build than before
New: Bunker Door
-Created with Titanium
-Can not be opened by basic mobs, only by hardmode/invasion enemies, but it still takes some time.
-Unbreakable
New: Trap Door
-Made with wood
-Can not be opened by enemies, but can only be placed horizontally
New: Iron/Lead Hatch
-The same as the trap door, the only change is visual
I don't know how much work this would be, but it would be an interesting addition to the game.