User blog comment:PreferstoremainAnonymous/Multiverse Combat: Round 1/@comment-1197011-20200605143612

For this first round, I'm inclined to think the Xenomorphs win.

The Martians' main weapons are the heat-ray and the black smoke. The heat-ray is hot enough to melt lead, but we've seen Xenomorphs survive being immersed in molten lead, so, they can withstand this temperature. And the black smoke probably wouldn't be effective either, as the Xenos can withstand space vacuum.