Mediumcore mode

Mediumcore mode is a difficulty mode that can be chosen during character creation as an alternative to hardcore mode or softcore mode. The mode chosen determines what happens to the character in the event of their death. When a Mediumcore character dies, they drop everything in their inventory; this includes all money and ammo placed in their respective slots.

Tips

 * Playing on mediumcore as a new player is inadvisable and dangerous, as you'll certainly die a lot. Dying in an unreachable place without any way of getting your possessions back can be extremely frustrating, even for experienced players. On the other hand, when you die in, say, Underground Hallow or post-Plantera dungeon, getting to your things safely is like a coming-of-age ritual. If you can succeed only with your secondary equipment, then you truly are a skilled player, not to mention that for many players, such moments are the most challenging and exciting ones.
 * If you play on mediumcore, keep your second-to-best equipment in a chest, so that you can find your things safely.
 * Pre-hardmode: Make a chest with some armor (the second best you have, but even silver will do) and a sword/bow depending on your progress (Light's Bane/Blood Butcherer can be obtained fairly quickly and are good until hardmode). Don't forget some accessories (useless accessory with +3 or +4 defense is better than good accessory without modifier-you'll need defense much more than anything) and magic mirror and grappling hook come handy as well.
 * Hardmode: The things you keep for emergency become much more important. Use the best armor you can craft with your current resources (Molten Armor is in this case obsolete ever since you enter hardmode), use at least mythril. The same goes for weapons, but you'll probably jump over most enemies anyway. Nevertheless, you will surely encounter an enemy you need to kill and in that case you need to deal proper damage. Accessories are very valuable, especially the ones that help you escape from monsters. Pack a spare pair of Wings/Rocket Boots, Cobalt/Obsidian shield for running through enemies without stopping, and any armored/warding accessory (don't be ashamed to equip warding aglet or shackle, the defense bonus is invaluable). Ivy Whip/Grappling Hook is good, but Greater Healing Potions and Magic Mirror are crucial. It's best to teleport back home anytime you are in danger, because if you lose your secondary set of equipment in an unreachable place, then your things are probably lost forever. If you really want to dot the i's and cross the t's, pack some ironskin and regeneration potions.