diff --git a/p2ce/campaign.d.ts b/p2ce/campaign.d.ts
new file mode 100644
index 0000000..98cbbb2
--- /dev/null
+++ b/p2ce/campaign.d.ts
@@ -0,0 +1,63 @@
+/**
+ * @packageDocumentation
+ * P2:CE Campaign API.
+ */
+
+interface ChapterMap {
+    name: string;
+
+    meta: Map<string, string>;
+}
+
+interface ChapterInfo {
+    id: string; 
+    title: string;
+    maps: ChapterMap[];
+
+    meta: Map<string, string>;
+}
+
+interface CampaignInfo {
+    id: string; 
+    title: string; 
+    chapters: ChapterInfo[];
+
+    meta: Map<string, string>;
+}
+
+// Holds multiple campaigns
+interface CampaignBucket {
+	id: string;
+    addon_id: number; // Workshop Addon ID or -1 if not present
+	campaigns: CampaignInfo[];
+
+	meta: Map<string, string>;
+}
+
+interface CampaignPair
+{
+	bucket: CampaignBucket;
+	campaign: CampaignInfo;
+}
+
+/** [API not finalized] The Campaign API. Exclusive to P2:CE! */
+declare namespace CampaignAPI {
+    function ReloadCampaigns();
+
+    function GetAllCampaignBuckets(): CampaignBucket[];
+    function GetActiveCampaign(): CampaignPair|null;
+    function IsCampaignActive(): boolean;
+    function FindCampaign(campaign: string): CampaignPair|null;
+
+    function GetCampaignMeta(name: string|null): Map<string, string>;
+
+    function SetActiveCampaign(name: string|null): boolean;
+    function StartCampaign(campaign: string, chapter: string, map: number): boolean;
+    function ContinueCampaign(campaign: string): boolean;
+
+    function GetCampaignUnlockProgress(campaign: string): number;
+}
+
+interface GlobalEventNameMap {
+    PanoramaComponent_Campaign_OnActiveCampaignChanged: (campaign: string|null) => void;
+}
diff --git a/p2ce/caption.d.ts b/p2ce/caption.d.ts
new file mode 100644
index 0000000..281d2bf
--- /dev/null
+++ b/p2ce/caption.d.ts
@@ -0,0 +1,21 @@
+/**
+ * @packageDocumentation
+ * Captioning Interface
+ */
+
+interface Caption {
+    bLowPriority: boolean;
+    bSFX: boolean;
+    nNoRepeat: number;
+    nDelay: number;
+    flLifetimeOverride: number;
+    text: string;
+    options: Map<string, string>;
+}
+
+interface GlobalEventNameMap {
+    BadCaptionRequest: (token: string, lifetime: number) => void;
+    DisplayCaptionRequest: (token: string, caption: Caption, lifetime: number) => void;
+    DisplayRawCaptionRequest: (text: string, lifetime: number) => void;
+    CaptionTick: (time: number) => void;
+}
diff --git a/p2ce/workshop.d.ts b/p2ce/workshop.d.ts
index c011f60..e80c5bd 100644
--- a/p2ce/workshop.d.ts
+++ b/p2ce/workshop.d.ts
@@ -99,6 +99,9 @@ declare namespace WorkshopAPI {
 	/** Enables or disables a set of addons in one fell swoop. Use this if you're planning to enable/disable multiple at once */
 	function SetAddonListEnabled(addons: Record<int32, boolean>): void;
 
+	/** Returns the content path of an addon at the specified index. */
+	function GetAddonNamedPath(index: number): string;
+
 	/****** Below here are @TODO items!! *******/
 	
 	/** Returns the index of the addon that owns the specified map, or null if the map is not owned by an addon. */
diff --git a/shared/panels.d.ts b/shared/panels.d.ts
index dbff07c..f760da1 100644
--- a/shared/panels.d.ts
+++ b/shared/panels.d.ts
@@ -451,6 +451,12 @@ declare interface Label extends AbstractPanel<'Label'> {
 	SetLocalizationString(text: string): void;
 
 	SetProceduralTextThatIPromiseIsLocalizedAndEscaped(text: string, allowDialogVariables: boolean): void;
+
+	/**
+	 * Approximates the height this label would have
+	 * if the passed in text was set, given a pre-determined width.
+	 */ 
+	GetHeightForText(width: number, text: string): number;
 }
 
 declare interface Movie extends AbstractPanel<'Movie'> {