This mod allows you to check what is unlocked with ease!

As many modders know, Isaacs Mod API does not have a way to check whether any achievement, character, collectible, etc. is unlocked or not. This library allows you to do just that.

The API

First, all functions are located in KZLibs.AchievementChecker so you may create a local variable pointing to that.

Most functions use one of the game's mod API ENUMS as it's only parameter.

Using any invalid (outside of range) value as a parameter will return nil.

Achievements

You can chack whether any of the 637 achievements are unlocked using isAchievementUnlocked(<num>), where the parameter is the numerical id of the achievements.

Collectibles

To check for collectible items, use isCollectibleUnlocked(<CollectibleType>).

Players (Characters)

Use isPlayerUnlocked(<PlayerType>).

Trinkets

Use isTrinketUnlocked(<TrinketType>).

Cards (and runes)

Use isPlayerUnlocked(<Card>).

Pill Effect

Use isPlayerUnlocked(<PillEffect>).