Since there is so little activity on the forum and I don't have time to make a new map, I thought I'd post my very first experimental map for those itching for something new. It was originally made primarily as a learning tool for myself so I could learn about LUA, and although I abandoned it's development long ago, it is playable.
Despite many attempts, I was never able to make the gameplay satisfactory. I wanted to make a "King of the Hill"-type map, but found it too difficult to overcome the game's innate desire to expand rather than hold a specific asteroid. I could artificially replicate that behavior, but then had trouble balancing the difficulty level so as not to be too easy or too difficult for the player. I also wanted to experiment with visual indicators the player could use to monitor the game's progress. I tried to make a map that could be played in a short period of time, and that would also be relatively fast-moving in it's gameplay.
Give it a whirl. It will randomly pit the player against 1 to 3 opponents. You may find it a challenge- or not.