Release 5 brings a lot of changes.
NEW SYSTEMS
* Items, rooms and monsters now have a rarity, giving the developers more control over how often you will see certain elements of the dungeon.
* There is now an 'unlock' system, which means that some items, rooms and monsters will be unlocked as you manage to get more victories. For instance, winning three victories will unlock the ravenous armadillo; winning four victories will unlock the essence of greed; and so on.
* You can now reset your victories and your achievements. (If you want to experience unlocking stuff from the beginning, you should reset your victories first.)
NEW CONTENT
* New weapon: the backstabber, a cursed dagger that sometimes attacks random people, including the wielder.
* New weapon: the spiked mace of the ape king, a weapon that grows every time it deals damage.
* New clothing: the cloak of reflection, a cloak that sometimes reflects ranged attacks back to the attacker.
OTHER CHANGES
* The help menu has been revised. It features updated contact information, and a section with help for players new to interactive fiction.
* The pierce skill now improves with concentration.
BUG FIXES
* The holy symbols and the unholy symbols now also affect the smoke demon.
* You no longer have to duck under the chain golem's chains when using the pierce ability.
* Having no concentration no longer allows you to always escape the chain golem's chains.