There was this cool HL2 test mod created for HL1 called sniper wars or something.
they were testing all this stuff including a cool map creator on a server.
It was quite bugged. But the cool thing about it was, there was no official type of map. the Devs made it so every map was brand new because the server generated the map before the rounds started. So you never played on the same map. It was quite cool, actually.... it was very cool.
If boxwars had something like that, it would be fun i suppose.