Who wins?
By entire, I mean EVERYTHING. Halo, for example, would have all of the Precursors, Forerunners, Covenant, Flood, and Humans all teamed up against ALL the Star Wars universe
They all have their technology as well. Halo has their Halo Rings and such, Star Wars has all their Star Destroyers and Death Stars and all that
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As much as I love Halo this fictional battle has been done to death. Star Wars has just too much power going for it, a medium turbo laser on a destroyer generates 200 gigatons of energy. And there are multiple turbo lasers on a light destroyer. A heavy turbolaser puts out 175 Teratons, releasing 175 x 4.184 x 10^21 J, or 7.322 x 10^23 J of energy. Per second. These are standard weapons. Star Wars wins just through ludicrous overpowered numbers. On the other hand, does it matter?