Where's teraforming?

[General Hawkwing]

Maybe a comp. that stripped all atmosphere away from a planet. A bomb that made at the gases in the atmosphere precip to the planet surface, not like rain but as a solid. Like in high school chem, with sodium and cloride? or something. This is easier to imagine with rock/ice than with gas giants, but could be very nasty, especially if you choose none for atmosphere type.