The Tony Show wrote...
I played through the first time on "Normal", then jumped straight to Insanity for my second run. I thought it was impossible at first too, but I stuck with it and learned a lot.
You really need to use your different ammo types and debuff abilities like Warp and Overload. Nearly everything in the game (even Varren!) has armor, so invest early in Incendiary ammo and incinerate. For the Blue Suns, Heavy Mechs and Asari you'll face (which all have shields), you need someone in your party with Warp, Warp ammo or Disruptor ammo. Many collectors use Barrier. Play as a soldier and get used to switching ammo types on the fly during a battle instead of just picking one at the beginning of the mission. I also recommend turing Squad Power usage OFF in the option menu- that way when you need a teammate's power, they aren't ever in cooldown unless you told them use something. In that panic situation, you always have the ability to have one of them toss out a pull or Concussive shot to save you.
Most of my battles went down like this: Incendiary ammo ON, shoot armor while having teammate cast incinerate. Once armor drops, have teammate use pull, followed by more shooting from me and a Reave or Throw from other teammate. For people with Shields I switched to Disruptor ammo while my Tech used Overload, then went back to the previous config when the shield dropped. You can also just reverse the tactics if you'd rather play the Adept, and bring a team of Soldiers like Zaeed and Jacob or Grunt.
Bottom line is that Insanity really forces you to learn which ammo and bitocs counter which defense. Incendiary ammo/Incinerate beats armor/health, Warp/Warp ammo beats Barrier, and Overload/Disruptor ammo beats Shields. Lots of switching during the battle, and (most importantly), the right team for the right mission. If you take techs on the Colony invasion mission where you fight nothing but Husks and Collectors (Barriers and Armor) then you're hosed. Know your enemies defenses and take the people who can counter them.
Kudo's for a quality post, worth repeating. Instead of "Yew SUCK" and "L2P" this is a great response. Kudos to others who responded in the same vein.
I'm a Veteran player because that's the current difficulty level comfortable to me, the level where I have fun and can soldier through mobs of enemies and feel powerful. By "soldier through" I mean, not having to retreat or kite enemies, just rush 'em and annihilate them. If I'm caught out in the open, I can take 2 or 3 shots before being forced to take cover. Bioware described this difficulty level as the "definitive ME2 experience" and I agree with that.
That said, I'm still eyeing Hardcore level, and the Insanity achievements. Due to posts like that one, above, and others, I'll probably take another crack at Hardcore.
As far as Insanity goes, though, I don't know if I'l ever bother trying it. The playstyle just sounds un-fun to me - always hiding, retreating, kiting enemies. Getting one-shotted despite having shields and armor. Why it's named Insanity, I suppose. I can understand how it can be played and beaten in most areas, but what about where you can't retreat, and are facing one or more heavy mechs? Can anyone claim to have beaten Insanity without having to reload numerous times? Now THAT would impressive.
One thing about hiding behind cover and making sure your squadmates are concealed as well. Have you noticed that it's always your line of sight that matters, even for squadmates, in order to get successful shots & powers to work?
Anyway, while I don't know if I'll ever try Insanity, helpful posts like the one quoted above are great. Good stuff!