Me and my friends used to have a blast playing someone's Halo3 forge: Splatter Hill.
I waited to see if the original forger or someone else would redo it, but I didn't see one.

So, here is my simple remake of that map.
First map I've submitted here, and I don't have too much experience with forging.
But it's a very simple map and gameplay concept.

Team Crazy King of the Hill.
Take the hill and battle your opponents while crates and huge dice are shot at you to knock you off the hill (or splatter you.)
In each of the 4 corners of the room is a team spawn area. The custom gametype gives folks spawning 2 seconds of anti-spawn camping invulnerability.

Each team has a Mongoose in their base. Great for getting up top quick, or running down other players. But you cannot drive the Mongoose into the KotH zone, or you will be removed from the vehicle.

In- between each base along the outer edges are Active Camo armor pickups.
After 2 minutes, a custom power-up appears in the bottom center of the map, in the windowed area underneath the Kill-Ball. (+Speed +Melee damage, 4x Overshield, etc.)

Starting weapon is a Shotgun. The only other weapons on the map are a round of plasma pistols in the bottom center (anti-Mongoose measures) and a Brute Hammer at the very top of the hill above the kill-ball.

If playing with 4 teams, keep the team colors BLUE, RED, ORANGE, and GREEN.

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My apologies if there are any issues. I did play a few games and everything seemed ok.
I did actually spend a bit of time on the map. The ramps for instance, are doubled and sandwiched together (one ramp right-side-up, the other up-side-down) so they are smooth and edgeless (more challenging to drive up). Color coordinated most everything too.

Of course, feel free to change up whatever you want. Replace the Active Camo armor permutations with other types of armor. Change up the plasma pistols with something else. Drop a few plasma grenades around. Whatever.

Hopefully you'll get a few laughs out of it.
The more people playing, the better this plays. 4x4x4x4 is a riot.