Here's an Overload 2004 modification for Unreal Tournament 2004.
The aim of the game in an Overload match is to deplete the enemy goal's health by shooting it. Once a goal's health reaches zero, the goal "overloads", and the attacking team scores a point. The goal is to score the most points by overloading the enemy's goal, while keeping your own goal safe.
But there's a twist -- both teams' goals regenerate their health by 10 points every second by default, and team-mates can shoot their own goal to regenerate its health. You'll need to play as a team if you want to break through the enemy's defences and overload their goal, while keeping your own goal safe.