The directions for playing UNO can be found in the box where the cards are located. UNO is manufactured by Mattel so one could contact Mattel if the original directions have been lost.
No, you do not have to say "uno out" when playing the game Uno.
No, it is not required to say "Uno" out loud when playing Uno, but it is a common practice to announce when you have one card left in your hand.
No, you cannot end a game of Uno by playing a wildcard.
No, you cannot win in Uno by playing a wild card.
Yes, in Uno, you do not have to switch hands when playing the game.
No, you cannot end a game of Uno by playing a Skip card.
No, you cannot end a game of Uno by playing a wild card.
No, you cannot end the game of Uno by playing a skip card.
Yes, you can finish a game of Uno by playing a Wild Card.
No, you cannot hide cards in Uno while playing the game.
No, you cannot win a game of Uno by playing a Wild card.
Yes, in Uno, you can end the game by playing a Wild Card if it is your last card and you declare "Uno" before playing it.