The BBC Micro conversion of Ultimate‘s classic Lunar Jetman is a very good one, using a high res display mode for the graphics, which are mostly monochrome (just like the Spectrum original).
The Commodore 64 version of Ultimate‘s classic Sabre Wulf was made by Greg Duddle of Mr. Micro for Firebird Software, who published the game in 1985.
The BBC Micro version of Ultimate Play The Game‘s classic Sabre Wulf is so chunky and garish that it hurts the eyes! That said: it plays well enough.
By the time Pentagram came out in 1986, famous development and publishing house – Ultimate Play The Game – had been sold off to US Gold. How much of Pentagram was therefore down to Ultimate‘s designers, and how much was down to US Gold‘s programmers, is still a matter for debate. Most likely, Pentagram was a construct of US Gold, with Ultimate providing only the initial ideas, graphics and game engine (the famous Filmation Engine).
Knight Lore for the Famicom Disk System was developed by Tose Co. Ltd. for Jaleco with the blessing of its original creators, Rare. It was published only in Japan in 1986.
The MSX version of Knight Lore was developed by Tose Co. Ltd. for Jaleco and published in Europe and Japan in 1985.
The Amstrad CPC version of Ultimate‘s famous Knight Lore is the best-looking version, in my opinion.