- Pachell
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- Exalted Heroic Member
the pillar of autumn wasn't a frigate known for carrying too many weapons if i can remember correctly, and they kind of fled away in the first place, so you only have the weapons available in the pillar of autumn in halo: CE.
As for halo 2, the same thing applies pretty much, considering you are fighting mainly away from earth.
But another explanation is that in 2001 or whatever they didn't think of the Spartan Laser yet, and they came up with explanations for everything to cover stuff up, and adding them to halo 3:ODST is just awesome.
Even if it was a plot hole, who cares, it will only make the game better.