Hi guys. I dont know if this is the right place to ask this but... Heh, I just got everything in the game. There's a mod which have more hard things to do/to fight using halloweed equipments? I'm not asking for someone to do it, Im asking if you guys know of a good mod that can turn the game more hard. :3 And sorry for my bad english.
Not sure about making the game harder, but check this place, specifically those with a lot of views/replies: http://www.terrariaonline.com/forums/client-server-mods-tools.51/ You can also check out the ones with not a lot of view/replies, but i can't guarantee that it's going to be a good mod. There could be good mods that aren't noticed well though.
Also, look here: http://tconfig.wikia.com/wiki/Modpacks. There are some mods that increase difficulty.
For difficulty increase in general, you can use my Difficulty Changer mod, which increases/decreases the stats of each vanilla and modded npc. For a shitload of extra contents with a fucking huge difficulty increase, I suggest pretty much to use Omnir's modpack.