Collector items...do they remain forever?

[Powder Keg]

Just curious, because I plan on getting the Bio Panic room and plenty of Defrolls when I have to re-make my armor PM down the road.

[Weeaboolits]

I don't see why they wouldn't.

[Katy]

The only things in this game that aren't forever are holiday themed lobbies/enemies and events like 1up/Winter Event (GBR not included). Even certain casino items not currently available any more are in "rotation" and should come back eventually.