it would be a reverse ctf, except only one side would have a flag. lets say red defends and blue attacks for this example. in the blue spawn, there is the red flag. In the red spawn there is a brush (hammer mapping vocabulary) with the entity: blue_flag or whatever tied to it. It would work better if the red team could not return the red flag to the blue base by touching it. but it would still be cool.

The red team would start at a high up base. and the blue team would start down lower.

Sounds good but I think there will be a sort of mod like this for v2.0 . Not sure.... Ask to one of the dev team

Gamemodes like this are being considered for the future, but not for v2.0.

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"If they rape and kill me, I hope they kill me first. That way, I sort of win."

Oh ok

with my idea (should work), you dont need a mod side game mode. It would work better if there was a mod side mode, but you can still replicate it map side.