Electronic/Spin-off
Physical Gadget
UNO Stacko
UNO rules applied to a Jenga-style tower of 45 colored, numbered blocks.
Players
2-10
Age Rating
7+
Deck Size
45 cards
Released
1994
The Story
UNO Stacko replaces the card deck entirely with 45 plastic blocks — colored red, blue, yellow, green, and purple, numbered 1-4 with additional Reverse, Skip, and Draw Two blocks, and purple blocks acting as Wild — stacked into a tower three blocks per layer. On a turn, a player pulls a block matching the color or number of the last block removed and restacks it on top, using only one hand; the round ends the moment the tower falls, and the player who caused the fall loses.
Rule Twists vs. Classic UNO
Everything below is an official printed rule unless flagged otherwise.
Jenga-Style Tower
Instead of a hand of cards, 45 blocks are stacked into a tower. Players pull a block that matches the color or number of the previously pulled block and restack it on top, without knocking the tower over.
One-Hand Rule
Players may only use one hand at a time to touch the tower. If caught using both hands at once, any other player can call it out and force that player to remove two blocks of their choice as a penalty.
Losing on the Fall
The round ends the instant the tower falls; whoever caused the fall loses that round.