Wolfenstein

Personally I made sure my first playthrough was on Uber so I could net both this achievement as well as super soldier. These difficulties aren't too bad and the only difference between this and normal would be more enemies and some say more accurate AI.

First things first, don't rush! Even if you are going for Blitzkrieg because the game isn't really that long to begin with. So when you see your health getting low get in to cover, and fire around cover. The Kar is good for long range shooting and use the veil to spot enemies as the lighting is sometimes rather poor.

Another tip, don't forget to use your abilities! The veil is your best friend on the harder difficulties simply because when you are stranded and need to get back due to low health the shield can protect from all projectiles and the empower ability makes almost all average enemies die in an instant, especially with the MP43. As for slowing down time, this comes in handy when you are peeking out from cover as it gives you more time to adjust your aim.

I didn't worry about collectibles this playthrough but I did pick up all the gold I saw so my guns would be decently upgraded. Even just casually picking things up I had 2 maxed weapons and was just fine with that. (MP43, MP40 , partially upgraded Flamethrower). You may want to put a scope on either the MP43 or Kar as those make long range combat MUCH easier and will make big fire fights less distressing most of the time./

The biggest tip is to keep trying! A lot of the campaign is trial and error and you will die a couple times despite the difficulty not being so bad. Just learn from those deaths and get your revenge in a next life! As for bosses, always use the veil to see their weaknesses. Most of the bosses aren't too bad besides the last two and the first as you have no powers. But just keep trying and eventually you will get through it! If you want tips on any bosses feel free to PM me with questions other than that, good luck!

First make your run on a easier difficulty to do the collectible run. (Uber is actually just a little bit harder than easy.. You could just do all in 1 run :))

After that start the game on uber difficulty and while playing the game just follow the navigational star to your objectives. Keep running without killing enemies underway, you will hit a lot of checkpoints without entering combat. If there are too many enemies to run by, kill a few and repeat.

Try to use veil "timeslowdown" or shield when running past enemies.

Good luck!