Guide:Surviving in the Crimson

Like the Corruption, the Crimson is a difficult environment to survive in with its strong enemies that can be very troublesome for new players. Exploring the biome is required to progress in the game, due to the Deathbringer Pickaxe being required to mine Hellstone.

Planning
The Crimson can be explored at any time, having at least 200 health and mana as well as good gear is very recommended before attempting to do so.


 * Iron or Lead armor is the minimum, but better ones should be used if obtained. If using Magic weapons, the Wizard set with Wizard Hat and Diamond Robe will provide very big stat buffs to all of them.
 * The Ice Blade, Enchanted or Ice Boomerangs, Trident or Rally are the best melee weapons available. If the Eye of Cthulhu has been defeated, the Blood Butcherer should be used.
 * If the player has obtained it, the Enchanted Sword or Arkhalis will do a fantastic job against Crimson enemies.
 * The Gold or Platinum Bow is a very good weapon made even stronger with Frostburn Arrows. The Tendon Bow should be used if the Eye of Cthulhu has been defeated.
 * The Ruby or Diamond staves can be easily obtained with the Extractinator, and they will easily handle the enemies.
 * Javelins, Grenades and Poisoned Knives are cheap and strong weapons to use. If the King Slime has been defeated, wearing the Ninja armor will make them significantly stronger.

The Surface
Unlike the Corruption, the Chasm consists of an entrance to a "cave" instead of multiple, deep pits. This makes exploration easier, although the enemies are arguably more dangerous to make up for it.


 * The Crimera is the crimson-counterpart of the Eater of Souls. They will hover above you, and sometimes swoop down and attack you. Like their corruption counterpart, they will not submerge in water, and can overwhelm you if they're in a pack. Ranged weapons can easily deal with them, like a good Bow or an Enchanted Boomerang.
 * The Face Monster is like a Zombie, except taller, and has lot more knockback resistance. This makes it harder to kill with close ranged weapons.
 * Blood Crawlers are the main threat when exploring. On the surface, they can be considered a weaker version of the Face Monster, but in the cave, they can crawl on the walls, making them a lot less vulnerable to knockback, and harder to deal with overall. They are the most common enemy underground, and they will make it hard to explore the cave. Ranged weapons or a Spear should be used.

Underground
The main reason to go into the cave is for the weapons obtained from the Crimson Hearts. They can be found at the bottom of them, and they will drop an item when destroyed. After three are smashed, the Brain of Cthulhu will spawn.

They let off a faint glow which will allow the player to easily locate them, but can only be reached initially by use of Bombs or Purification Powder purchased from the Dryad. They can be destroyed by using a Hammer or Bombs. Make sure that you have a Lucky Horseshoe or similar fall damage negating accessory. Grappling Hooks can also be used to cling to walls as an alternative method. Be wary of Blood Crawlers on your way down.


 * When the first Orb is broken, the text "A horrible chill goes down your spine..." will appear;
 * When the second is broken, the text "Screams echo around you..." will appear;
 * When the third one is broken, the Brain of Cthulhu will spawn, with "Brain of Cthulhu has awoken!" appearing.

The 3rd heart should not be smashed until the player is ready to fight the Brain of Cthulhu.

Hardmode
Just like the Corruption, a diagonal strip of Crimson biome will appear on one of the sides of the world, and it will also start spreading.

The player will also be able to use the Pwnhammer dropped from the Wall of Flesh to smash the Crimson Altars. Destroying them will generate new ores, which are almost mandatory to progress in the game. Smashing 9-12 Altars will be more than enough for most of Hardmode, since more than that won't generate too many new ores. Breaking altars will swarm the player with Wraiths, so they should be very quick when doing so to avoid dying.

Altars are also crafting stations, so it isn't a bad idea to leave one for the special recipes requiring them.

Note that smashing Altars has a chance to infect a random block in the world. This will barely affect the overall spread, but it can infect areas the player tried to protect.

After the altars are smashed, the Crimson should be avoided until better gear is obtained, since Pre-Hardmode weapons and armors won't be enough to deal with the new enemies.

Recommended Gear
As the bare minimum, the best Pre-Hardmode armors of the player's class should be used, such as Molten armor, Necro armor, Jungle armor or Wizard set and Bee armor for Melee, Ranged, Magic and Summoner users respectively. Armors made with Hardmode materials should definitely be used if obtained.

The player should also get a strong Hardmode weapon before venturing in. There are many choices depending on the class used:
 * Melee users should grind for an Amarok in the Snow biome as it can be easily obtained at the beginning of Hardmode and will last until the Mechanical Bosses are defeated. A Sword or Spear made with the new ores will also do fine against them.
 * A Ranged character is better off with the Clockwork Assault Rifle dropped by the Wall of Flesh or a Shotgun. The Repeaters made with the new ores will also do just fine against them.
 * A Mage may want to farm for a Sky Fracture, made with a Hallowed Desert's materials. They can also fish for a Crystal Serpent, or just use the Laser Rifle dropped by the Wall of Flesh until better weapons are obtained.
 * Summoners will need a Spider Staff and Queen Spider Staff, made with Spider Nest's materials.

With good gear, it is a lot easier to survive in the biome. Once the diagonal strip has been located, the main thing to do is to find a good area to farm Souls of Night and Ichor, as the two will be needed for many recipes in the game. The best place would be a wide, open area with a little "safe zone" like an Underground Cabin where the player can take cover from enemies and heal. If no such place is found, with a couple Mining potions or Explosives it can be built.

There are many new enemies that will threaten the player: the Herpling, Floaty Gross, Ichor Sticker, Crimslime, Blood Jelly, Crimson Axe and very rarely the Crimson Mimic. Red Pigrons will also appear on an Underground Snow Biome infected by the Crimson.


 * Herplings are very dangerous; they are fast, have a lot of knockback resistance and do a lot of damage. They can easily kill a new Hardmode character. However, they can't jump very high, so using a Hook or Wings to stay above them will make them much easier to deal with.


 * Floaty Grosses attack similarly to Wraiths by going through blocks. They also have a small chance to inflict the Weak debuff on hit. They don't have a lot of health, and they are very vulnerable to knockback, so they aren't too hard to deal with. However they can easily catch a player off guard with their ability to go through blocks. They are also more dangerous when dealing with multiple enemies at once.


 * Ichor Stickers are arguably the most dangerous enemy. They have more health than the other enemies, and they shoot an accurate Ichor spit which does a lot of damage and inflicts the Ichor debuff, which will reduce defense by 20. They can't attack through blocks however, and their rather big size will get them stuck more frequently on blocks as well as making them easier to hit.


 * Crimslimes and Blood Jellies act just like a regular Slime or Jellyfish, but with higher stats. They aren't very dangerous compared to the other enemies.


 * Crimson Axes are a very rare enemy that can go through blocks, and can inflict the Cursed debuff on hit. While this status effect can be devastating, they will stop moving if attacked, so they are fairly easy to deal with.

Tips

 * Build a Base either at the edge of the Crimson, or actually within it, with whatever resources, crafting stations, or other resources you need. Start with workbench, bed, and a couple of chests, then see what else comes to hand.
 * Even if you don't have a full skybridge or skyrail, running minecart tracks over the Crimson area (above reach from the ground) will let you skip past the dangerous area quickly when you have business beyond it.
 * The central cave of the Crimson Chasms makes an excellent arena to kill the Brain of Cthulhu, once you've fitted it with platforms, Campfires, and other conveniences.
 * To summon him in the arena, you can break more Crimson Hearts and dash for the arena, or just use a Bloody Spine to summon the Brain at your leisure.
 * Even if you can't defeat the Brain outright, killing its Creepers will give you Tissue samples and Crimtane ore, eventually letting you make Crimson armor. Once you have that, you can easily survive.
 * After you have broken a Heart, your world will also start getting Meteorites, which will provide another tier of weaponry and armor.