Overwhelming volumes of enemies, overwhemling pace and speed of motion all contributing to the unprallered exciliration notion.
steel has been promised t return at some point but it has been years so we shall see....
oh right also finale fot he game, kinda odd last few levels - the building destruction i can kinda see as good idea but not overall implementation of how it was done, the runabout for buttons was fine in concept but infinite enemies was awfull trick. now i get why - you want player to have ample arnment supply but that still means having to clear same rooms mre than once or twice which is increasingly aannoying.
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