[Shrink]

Even if it was steroids, which I doubt it is, it is Oddworld it doesn't have to make much sense.

Of course, there's no evidence to suggest Roid was the (plotwise) result of steroid like drugs. None at all.

Though they're technically described as 'adrenal steroids'.

It's also interesting how at Abe transformed into the Shrykull, Munch would have transformed into Roid, and how Stranger, strictly in terms of gameplay, transformed into the steef.