Neat seeing other Tatung Einstein box art and that John Higginbotham did more than just the Miner Dick piece I turned up. Interesting too that the art is double signed 

Looks like this would actually be "Einstein 5 Game Pack" (not 256), with the 5 games being ICE'EM, FLUMMOX, 256 INVADERS, PACCY, and HUNCHY. But I do see that there was a revised version of the computer called the Tatung Einstein 256, released in 1985. All new to me!

https://www.computinghistory.org.uk/det/52183/Einstein 5 Game Pack/