I'll be waiting for the official release of these.:)
Expect have these::
For example, unlock the only BOSS fight.
unlock BOSS and enemy illustrations Pixel map, Check out the enemy's backstory
There will also be additional hidden BOSS and even difficult levels. Maybe the configuration of some enemies will also change. Players may even encounter mini-BOSS that do not appear in other difficulties, such as the Perfect Tank. (
Difference in difficulty: In normal difficulty, the soldier corpses will not react, but in hard difficulty, parasites will suddenly erupt and attack from behind. )