Even without forge, so many options are already avaliable in custom game, why not ?
I got some ideas:
Ghost Slayer: Invisible start, but everyone got a “detection nade(I’ll explain latter)”, so you can use detection nade to detect invisible enemy. “detection nade” is dynamo nade but nerf the damage to minium, when you throw it the it won’t do much damage but it will electrify foes around it and reveal them, also a electric link will show your foes position. Why not using thread sensor: because we don’t have options for starting equippment.
Space Heatwave: Simple, zero-g and bottomless heatwave and maxium grapple start, play best on Catalyst. Grapple can help you move in zero-g. Catalyst is a mapping with large enough empty space and enough wall for you to grapple at (Behemoth is big but lack of wall for traversal). This mode can be made from Ninja Slayer so you can have a grapple start.
Regeneration Slayer: Turn off auto health/shield regenration, but reward you health/shield when you do damages to your enemy. So you have to keep shooting for health and shield. A super sweaty mode since it always end up with 2 players keep shooting each other without dying.
Ghost Ninja: Ninja slayer but everyone invisible.
All these modes can be made from Custom game rn, and it’s very fun. Ask community for these kind of fun mode options and vote them for weekly rotation plz. Even someone don’t think they are fun, they bring fresh air to game and only stay for a week.