Complex sentence: Citadel is a computer game released in 1985 for the Acorn Electron and BBC Micro by Superior Software that combines platform elements with puzzle solving in a style similar to the later Dizzy series of games, although completely different in plot and setting.
Split into simpler sentences: Citadel is a computer game released in 1985 for the Acorn Electron and BBC Micro by Superior Software. It combines platform elements with puzzle solving in a style similar to the later Dizzy series of games, although "Citadel" is very different in plot and setting.