WG game set in SCP universe would be interesting. There’s a ton of interesting characters to work with (such as 999, Dr.Bright) and you can even come up with your own SCPs.
The plot wouldn’t have to be about any containment breach, but maybe just life in facility?
You can be a scientist, or D-Class personnel (or maybe Guard?)
Mod for an already existing game would be hard to make, so it would either be a visual story, text adventure or an interactive novel. Whatever floats anyone’s boat.
edit: here are some of my ideas:
SCP-999 (the friendly slime) making you gain weight
SCP-294 (the drink machine) giving you weight gain liquids
SCP-049 (the medieval doctor) giving you weight gain serum
SCP-1025 (the disease book) making you gain weight through some illness
SCP-914 (the upgrader) making you fat through upgrades (maybe The Fattener instead of The Upgrader?)
SCP-871 (the infinite cake) cake that reappears at different forms or sizes
I remember there being a rather simple SCP that was, in a nutshell, a cake. That kept replicating and sometimes the replicas would be different cakes. Which they made the D-Class eat so that the world wouldn’t get overrun by exponential cake multiplication. I forget what the number was nor do I even know if it’s still on the site. Still. Something to think about if slime isn’t a person’s thing.
SCP-458 was practically created for this, for those who do not know it, it’s a pizza box that when
in contact with humans automatically generates your favorite pizza.
SCP-807 Heart Attack on a Plate.
A plate that makes food served on it into a highly concentrated version of itself with high fat, sodium, and cholesterol, plus making the food highly irresistable.
Come on, if you put food on it, it becomes highly fattening and near impossible to say no to. It’s definitely useful.
all we need is an SCP who can talk to other SCPs and convince 807 to make the foods non-lethal
(I don’t recall if there is one that can do that anywhere, but there have been a few who talk to each other)