D2X-XL v1.7 offers a Monsterball game mode similar to the one found in Descent 3.

The level used must be flag enabled (i.e. contain team goals for both teams).

If the level initially contains a monsterball, it will respawn in the center of its original cube when a team has scored. Otherwise it will be spawned randomly in the level when the game starts, and will spawn randomly after scoring. The first method seems to be preferrable, for game balance reasons (can theoretically random spawn close to a team goal, which would give the other team an unfair advantage. In the long run, this would be statistically evenly distributed, but it would still cause people to complain and take some of the fun out of the game).

There is a small limitation insofar as hitting the ball at any angle will always push it straight away from the player pushing or firing at it. This is rooted deep, deep in the D2 engine and very hard to change.

Weapon and ship impact forces can be modified in a new dialog accessible via the multiplayer options dialog.

DLE-XP allows you to place monsterball objects in levels.