In the context especially of science fiction, when we humans go to the alien world and apply our technology to alter the temperature, atmospheric composition, flora and fauna, to be more familiar and comfortable to us, this is called terraforming.
This word, by incorporating the Latin root Terra, almost necessarily implies Earth. The word in Latin essentially means "Earth shaping." Our modern novels, movies, and television abound with examples of taking something else, and making it Earth-like.
But what if the aliens turn the tables on us? They come here, make things hotter, pump some sulfur to the air, give the daylight an eerie green cast, plant some weird trees with purple spiky fruits, and so on. Can this also be called terraforming, or is there an equivalent without the reference to Earth?
As a specific example, the Masters in John Christopher's The Tripods were planning to __________ the Earth, thereby eliminating humanity.
Either a single word or a succinct multi-word phrase will do.
EDIT (In response to close votes, "Please include the research you’ve done"): I've read a couple articles on terraforming, to see if any refer to other variants. I've done web searches on: "opposite of terraforming" and "other types of terraforming" and read several results, finding nothing I could use. I also searched words like "martiforming" "joviforming" and "planetenforming" just on a lark, to see if anyone is actually using these words- the few results were generally not in English.