avp nightmare has beaten me got to the final boss as the alien n rage quit and lvl 4 as marine soo hard. and nfs the run on hard only got to the 2nd state the couldnt avance any further (still got the plat due to the glitch!!)
I don't really find hard modes difficult I more or less find them incredibly cheap because developers like to think making a game "hard" is just beefing up the enemies health times a million and making them kill you real fast. I also find in 3rd person games on hard modes enemies always seem to know exactly where you are and always seem to shoot at you regardless of you being visible to them or let alone being 10 miles away.
Dead Space 2 Hardcore mode. In terms of enemy strength and skill, and just general danger of death, hardcore mode isn't really that hard. But what makes it so hard is the "only 3 saves" rule. It's mentally tough, intimidating, nerve wracking, and makes you rage when you die because you know you just spent the last 3 hours for ABSOLUTELY NOTHING.
For some games, as long as you take your time and wait for the enemy to make their first move, you will survive more often. For others, it is a test of skill. There are many definitions of hard, though some developers perceive this to be higher damage + increased health = "hard", but that really isn't an accurate description.