With Forge, there was outrage not from fans, but from a bunch of idiots who are only familiar with Heroes through its Multiplayer and didn't bother to learn about the origins and plot of the series.
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And they replaced it with a flawed Conflux, plus the imbalance is noticeable.
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And I'm not sure that Forge could fit as harmoniously into "Heroes" as, for example, helicopters, self-propelled mortars, and goblin slicers with the same saws fit into "WarCraft". In order to successfully introduce such a specific Faction, it needs to be worked on skillfully, and the sketches from "3DO" leave much to be desired.