In halo combat evolved you can go to settings and turn decals off and there will be no blood (except blood from the convenant which is blue and purple)
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no
In halo One Combat Evolved Or any other halo games for pc,options are available to turn off images of blood and gore.
go to options and turn off decals
start halo/go to settings/video settings/decals/off
no you can not but there isn't that much really