The Orio Arena website has a version 0.53 beta of the Orio Arena mod for Quake III Arena. This mod is for one-on-one matches, seeking to eliminate the primary drawback of these type of solo duels, which is that often a single good player beats up on the other players who end up spending most of their game time as spectators while waiting for their turn to collect a serving of woopass. In Orio arena, the way around this is to offer multiple one-on-one matches all occurring simultaneously, using a built-in ladder system.