The answer to this question largely depends on what you are looking for in an accessory slot. Are you looking for a specific accessory like a sniper rifle scope or a grenade launcher? If so, you may not be able to find that accessory in the base game.
However, there are many additional accessory slots available as paid DLC.
One example of an additional accessory slot that is available as DLC is the ability to equip a secondary weapon. This secondary weapon can be anything from a standard rifle to a more specialized weapon like a sniper rifle or grenade launcher.
This additional slot can be very helpful if you want to switch up your playstyle and use a different weapon for different situations.
Another example of an additional accessory slot that is available as DLC is the ability to equip armor. Armor can provide players with increased health and resistances to certain damage types, making it helpful in many situations.
Armor is also available as paid DLC, so it is not limited to those who purchase the game outright.
All things considered, it is possible to get more accessory slots in Calamity if you are interested in doing so. However, it will likely require paying for additional content through DLC or purchasing the game outright.
