2 pirateships
2 cannons can be used to blow a hole in the other ship
ropes to climb on the ships.

CSS Teamdeathmatch map
2 opposing houses

features:
-walls to blast
-usable lifts
-extendable bridges
-extendable protective walls
-swimming-pools
-much more

I think i'm not the only one with this idea
its a mix of soccer and flipper.
A map for 2 teams with 2 goals and a steelball.
the only weapon is the physcannon combined with the ball.

each team tries to shoot the ball into the enemy goal to score.
The ball can not be picked up.
score 10 goals to win a round
There are catapults, spinning wheels and other things,that influence the ball

Cause this is only a map for HL2DM i can only offer a playground and not set every rule i'd like to.

have fun