Capture The Flag is a custom OP2 mission in which players 1, 3, and 5 (Eden) are against players 2, 4, and 6 (Plymouth). Each team has to capture the other team's flag and return it to their own flag to score. The game is either won by scoring a specified number of times or by having the most scores by a certain mark.
There are many features in this map, both major and obscure. For example, scouts are used to capture flags, but they turn into cargo trucks when they are holding the flag. Each person is given unit 'points' that can be turned into the three different chassis and used to select a weapon to spawn them with. There is a timer that shortens the respawn time for a team with less scores; this exists because units are rewarded for scoring. Players with more units will have to use them more efficiently or a good player on the other team will be able to get new units into the game faster to make up for fewer units.
This map is no longer in development. A few major issues have prevented me from being motivated to finish it. First, it is very, very easy to camp on your flag; entire games have passed in which every single unit on one team didn't move for over 300 marks. Second, the source I have is a mess right now; I was trying to convert it into HFL format to use custom command panes to make unit picking a 'point and click' operation. This has failed due to the custom buttons being broken in HFL.