Index - O
| Occupied | Card |
| ofArrows | Direction |
| offseter | GameView |
| OffsetType | Card |
| Ogre | |
| 1 (Data Constructor) | Tile |
| 2 (Data Constructor) | Card |
| onContained | Contains |
| onContainedE | Contains |
| oneof | Random |
| onMouseEnter | GameView |
| onMouseEnter' | Event |
| onMouseLeave | GameView |
| onMouseLeave' | Event |
| onSelection | GameView |
| Opponent | Game |
| other | Spots |
| OtherPlayerLeftGame | ServerMessages |
| Outcome | Campaign |
| OutMessage | ServerMessages |
| overlay | PCWViewInternal |