Overturn - Word Board Game by Coleco Games (1988)
Overturn is a unique Scrabble Type Game .
The Tiles are Cylinders each with a Letter but in 4 Different Colours,Each Player has their own Colour.
As in Scrabble you Form Words with each Letter having a Score,Bonuses etc
Forming a Word in your own Colour doesn't mean you get to keep it, An opponent may use  Letters from your Words and take ownership of them by turning
the Cylinders to their own Colour.
And remember those points you've earned ? well now they belong to your opponent.
Players scores are calculated at the end of the Game by totaling the point value of each Word formed entirely in a Single Colour so there's always time to get your Points back.
The "Overturn" Game features unique play that continually shifts the upper hand from Player to Player, the Leader one Minute may be overthrown the next
with the final outcome unknown until the final Cylinder is Played.
The Game is for 2 to 4 Players,Aged 8 Years to Adult.

The Game is Complete and the Contents are in Very Good Condition.
The Box is also Very Good for its Age