Level transition: save data then open new level

Pattern: custom trigger or UI button → [save player data to SaveSlot] → OpenLevel(LevelName='Level_02', bAbsolute=true, Options=''). For loading screen: SetGlobalTimeDilation(0.001) briefly while level loads (freeze world), or use AsyncLoadLevel with progress callback. Key: OpenLevel is in GameplayStatics. 'LevelName' is the map asset name (not full path). bAbsolute=true discards current level completely. Options string can pass params like '?GameMode=BP_GM'.

Save and load game data with SaveGame class

Save: CreateSaveGameObject(MySaveGameClass) → Cast → SET variables → SaveGameToSlot(Object, SlotName, 0). Load: DoesSaveGameExist(SlotName, 0) → Branch → True: LoadGameFromSlot(SlotName, 0) → Cast to MySaveGame → GET variables. Put save/load logic in GameInstance for persistence across levels.

LoadGameFromSlot — load game data from named slot

Returns nullptr if slot doesn't exist. Always check DoesSaveGameExist first.

Struct

A user-defined data type bundling related fields (e.g. S_InventoryItem with Name+Count+Icon). Make/Break nodes convert.

Event Dispatcher: create, bind, and call with custom data

SETUP: In your BP, create an Event Dispatcher (e.g. 'OnPlayerDied') in the My Blueprint panel. BIND (in another BP): Get reference to actor → Bind Event to OnPlayerDied → connect a Custom Event as the target. CALL (in owning BP): Call OnPlayerDied (appears as a pink node) → this broadcasts to all bound listeners. Key: Event Dispatchers are called with 'Call <DispatcherName>' (not 'Broadcast'). Binding is done via 'Bind Event to <DispatcherName>' which has an 'Event' exec-like pin.

SaveGameToSlot — save game data to named slot

Save and load player data using SaveGame blueprint

SAVE pattern: EventBeginPlay or custom → CreateSaveGameObject(SaveGameClass=BP_SaveGame) → CastTo<BP_SaveGame> → Set all variables on cast result → SaveGameToSlot(SaveGameObject=cast result, SlotName='SaveSlot1', UserIndex=0). LOAD pattern: DoesSaveGameExist(SlotName='SaveSlot1', UserIndex=0) → Branch → True → LoadGameFromSlot(SlotName='SaveSlot1', UserIndex=0) → IsValid → Is Valid → CastTo<BP_SaveGame> → read variables. Key pins: SaveGameToSlot inputs 'SaveGameObject' (SaveGame), 'SlotName' (string), 'UserIndex' (int). LoadGameFromSlot inputs 'SlotName' (string), 'UserIndex' (int), output 'ReturnValue' (SaveGame).

DataTable driven item database: read stats from table

SETUP: 1. Create struct FItemData: {Name(Name), Damage(float), Icon(Texture2D), Description(Text)}. 2. Create DataTable with row type FItemData. Add rows (Sword, Bow, Staff...). READ: GetDataTableRow(Table=DT_Items, RowName='Sword') → Row Found exec → BreakFItemData(OutRow) → use Damage, Name, etc. DYNAMIC READ (from variable): SetVariable(CurrentItemName='Bow') → GetDataTableRow(RowName=CurrentItemName) → same flow. LIST ALL: GetDataTableRowNames → ForEachLoop → GetDataTableRow per name → display. Key: GetDataTableRow exec outs are 'Row Found' and 'Row Not Found' (NOT 'then').

DataTable

A spreadsheet-like asset holding rows of a struct type. Great for item catalogs, dialogue lines, level configs.

string

string