Games

arma3 has some really good hyper realistic dynamic campaigns with high replay value, for endless nazi killing fun.

Wolfenstien

Red Dead Redemption 2.

OK hear me out.

Sure the game's setting predates the Nazis and there are none to kill in the game. However, there is an entire inexhaustible faction of Confederates to murder. But even better than that, the game gives you several opportunities to stumble on a Klan meeting.

These encounters are special because they're a sandbox for creative butchery and guiltless massacre. Even the game's honor system looks the other way while you toss a gallon of liquor onto the burning cross, dousing the Grand Dragon and all his Cyclopses, sending them in a screeching panic, fully engulfed, off a nearby cliff just like that dude in Lord of the Rings.

The Sniper Elite series is basically nazi-killing porn. Those won't let you down, especially if you enjoy unplanned testicular detonations happening to nazis of any kind.

Wolfenstein. Any one of them. There has never been a bad Wolfenstein game.

Since the Wolfenstein games were already mentioned: The Saboteur

It aged quite a bit, but there are some nice mods to make it look and handle a bit better on Nexus Mods.

I don't know if anything really tops Wolfenstein TNO. Right from the get-go you're running through a trench dual-wielding machine guns and just shredding Nazis like you're mowing grass. Plus you can personally stomp Hitler's face in! 10/10 experience.

Commandos!

The one by Eidos, where there are "vision triangles" and you have to slowly take out a whole ton of nazis before terminating your objectives in each level.

My favourite is the Beyond the call of duty one.

Blow out Hitlers ball in Sniper Elite. Can't get better than that really. Or can you?

Well Wolfenstein: The New Order is the other classic to do just that!

I came here exclusively to reiterate.

The only good Nazi is a dead Nazi.

The first BloodRayne game (after the intro level, which is plain bad and almost nazi-free) sees a lot of bitten, shot, dismembered, burned, possessed and exploded nazis.

Honestly the gameplay is a bit clunky even for its time, but if what you need is dead nazis then it very firmly ticks the box.

Also remastered: BloodRayne: Terminal Cut

Return to Castle Wolfenstein VR port by Team Beef. It's amazing.

Gonna stray a bit from the other games mentioned here for the sake of adding something unique.

It's not your traditional nazis per say, but the half life series fits quite nicely with this urge. The combine are genocidal, totalitarian, they use shit loads of propaganda, etc. They don't have the looks of it, but they're clearly the nazi type.

Brutal Wolfenstein is a great mod for GZDoom (and free with freedoom). Imagine the original wolfenstein but you get to stain the walls with the blood of nazis. The difficulty is significantly increased, weapons hit harder, and everything is better.

Don't let your dreams stay dreams

The original monochromatic Castle Wolfenstein, blowing up Hitler with my buddy and his grandfather who lost family in the camps in Poland will always be a fun memory.

Nazi zombies, it shows them as the monsters they really are.

Return to Castle Wolfenstein and Wolfenstein (2009) for FPS.

Otherwise Company of Heroes (any of the three).
Exploding Nazis is just so much fun :D

Metro 2033 and Last Light.

But those are the only games I have with nazis in them.

Well... There is that one nazi in Killing Floor 2...

All time gotta be Wolf ET. No contest. Then BF1942. And my first love RTCW

Well, Machine Games other recent titles are pretty good in that regard, and every other regard.

Real life

I enjoyed return to castle Wolfenstein when it came out and competitively played Enemy Territory for years and even made a mod for it. I have no idea how it would hold up today, however