diff --git a/src/features/achievements/achievement.tsx b/src/features/achievements/achievement.tsx
index 4776fd1..baa86ca 100644
--- a/src/features/achievements/achievement.tsx
+++ b/src/features/achievements/achievement.tsx
@@ -1,3 +1,4 @@
+import { isArray } from "@vue/shared";
 import AchievementComponent from "features/achievements/Achievement.vue";
 import {
     CoercableComponent,
@@ -5,7 +6,6 @@ import {
     GatherProps,
     GenericComponent,
     getUniqueID,
-    isVisible,
     OptionsFunc,
     Replace,
     setDefault,
@@ -16,6 +16,12 @@ import "game/notifications";
 import type { Persistent } from "game/persistence";
 import { persistent } from "game/persistence";
 import player from "game/player";
+import {
+    createBooleanRequirement,
+    createVisibilityRequirement,
+    Requirements,
+    requirementsMet
+} from "game/requirements";
 import settings from "game/settings";
 import type {
     Computable,
@@ -31,28 +37,50 @@ import { useToast } from "vue-toastification";
 
 const toast = useToast();
 
+/** A symbol used to identify {@link Achievement} features. */
 export const AchievementType = Symbol("Achievement");
 
+/**
+ * An object that configures an {@link Achievement}.
+ */
 export interface AchievementOptions {
+    /** Whether this achievement should be visible. */
     visibility?: Computable<Visibility | boolean>;
-    shouldEarn?: () => boolean;
+    /** The requirement(s) to earn this achievement. Can be left null if using {@link BaseAchievement.complete}. */
+    requirements?: Requirements;
+    /** The display to use for this achievement. */
     display?: Computable<CoercableComponent>;
+    /** Shows a marker on the corner of the feature. */
     mark?: Computable<boolean | string>;
+    /** An image to display as the background for this achievement. */
     image?: Computable<string>;
+    /** CSS to apply to this feature. */
     style?: Computable<StyleValue>;
+    /** Dictionary of CSS classes to apply to this feature. */
     classes?: Computable<Record<string, boolean>>;
+    /** A function that is called when the achievement is completed. */
     onComplete?: VoidFunction;
 }
 
+/**
+ * The properties that are added onto a processed {@link AchievementOptions} to create an {@link Achievement}.
+ */
 export interface BaseAchievement {
+    /** An auto-generated ID for identifying achievements that appear in the DOM. Will not persist between refreshes or updates. */
     id: string;
+    /** Whether or not this achievement has been earned. */
     earned: Persistent<boolean>;
+    /** A function to complete this achievement. */
     complete: VoidFunction;
+    /** A symbol that helps identify features of the same type. */
     type: typeof AchievementType;
+    /** The Vue component used to render this feature. */
     [Component]: GenericComponent;
+    /** A function to gather the props the vue component requires for this feature. */
     [GatherProps]: () => Record<string, unknown>;
 }
 
+/** An object that represents a feature with that is passively earned upon meeting certain requirements. */
 export type Achievement<T extends AchievementOptions> = Replace<
     T & BaseAchievement,
     {
@@ -65,6 +93,7 @@ export type Achievement<T extends AchievementOptions> = Replace<
     }
 >;
 
+/** A type that matches any valid {@link Achievement} object. */
 export type GenericAchievement = Replace<
     Achievement<AchievementOptions>,
     {
@@ -72,6 +101,10 @@ export type GenericAchievement = Replace<
     }
 >;
 
+/**
+ * Lazily creates a achievement with the given options.
+ * @param optionsFunc Achievement options.
+ */
 export function createAchievement<T extends AchievementOptions>(
     optionsFunc?: OptionsFunc<T, BaseAchievement, GenericAchievement>
 ): Achievement<T> {
@@ -85,6 +118,21 @@ export function createAchievement<T extends AchievementOptions>(
         achievement.earned = earned;
         achievement.complete = function () {
             earned.value = true;
+            const genericAchievement = achievement as GenericAchievement;
+            genericAchievement.onComplete?.();
+            if (genericAchievement.display != null) {
+                const Display = coerceComponent(unref(genericAchievement.display));
+                toast.info(
+                    <div>
+                        <h3>Achievement earned!</h3>
+                        <div>
+                            {/* eslint-disable-next-line @typescript-eslint/ban-ts-comment */}
+                            {/* @ts-ignore */}
+                            <Display />
+                        </div>
+                    </div>
+                );
+            }
         };
 
         processComputable(achievement as T, "visibility");
@@ -100,30 +148,19 @@ export function createAchievement<T extends AchievementOptions>(
             return { visibility, display, earned, image, style: unref(style), classes, mark, id };
         };
 
-        if (achievement.shouldEarn) {
+        if (achievement.requirements) {
             const genericAchievement = achievement as GenericAchievement;
+            const requirements = [
+                createVisibilityRequirement(genericAchievement),
+                createBooleanRequirement(() => !genericAchievement.earned.value),
+                ...(isArray(achievement.requirements)
+                    ? achievement.requirements
+                    : [achievement.requirements])
+            ];
             watchEffect(() => {
                 if (settings.active !== player.id) return;
-                if (
-                    !genericAchievement.earned.value &&
-                    isVisible(genericAchievement.visibility) &&
-                    genericAchievement.shouldEarn?.()
-                ) {
-                    genericAchievement.earned.value = true;
-                    genericAchievement.onComplete?.();
-                    if (genericAchievement.display != null) {
-                        const Display = coerceComponent(unref(genericAchievement.display));
-                        toast.info(
-                            <div>
-                                <h3>Achievement earned!</h3>
-                                <div>
-                                    {/* eslint-disable-next-line @typescript-eslint/ban-ts-comment */}
-                                    {/* @ts-ignore */}
-                                    <Display />
-                                </div>
-                            </div>
-                        );
-                    }
+                if (requirementsMet(requirements)) {
+                    genericAchievement.complete();
                 }
             });
         }