This is a a discussion topic for the map "dm_ultracore" by venomus which can be found here
Map description:
My first HL2 map, I even sent this off to valve to enter the contest, though I can't say whether it has/will get there on time lol.
15/02/05: In case you didn't find this out elsewhere during the downtime, I have now released a public beta of the map. Click the download link above and post that gameplay feedback!
Map screenshots:
Screenshots for: dm_ultracore
