Tim Willits had a little interview with PC Gamesn in which he claimed he invented multiplayer only maps, taking fragments of maps and creating something new. Also claiming he put the idea to Romero and Carmack who both said it was a stupid idea.

Multiplayer maps - that was my idea. This is a funny story.

The following days John Romero, John Carmack and American McGee all wrote contradictory statements claiming the meeting never happened and that mutiplayer only maps had been in Doom, Rise of the Triad and Marathon so it was ridiculous that Tim Willits would claim the idea to be his.

"@romero gives a serial credit thief the what-for" - American McGee