We are definately moving to Half-Life 2. There are just so many aspects of the new engine we could take advantage of, that it was hard to resist.
We've refined the gameplay idea to make it more exciting. Rather than gold bars, players fight over crystal shards. These shards are used to power portals in the base. You see, there is a meteor heading for Earth and players must teleport to freedom. Portals can also be used to spawn players and items. There are only enough crystals to power one team's portals, so the battle begins...