I am not sure if video games have levels or stages in modern gaming but, we could at least talk about retro video game levels.
In levels I mean stages, not referring to leveling up on skill.
In unmemorable I do mean the level or stages that are boring, or bad level design, or just too hard to really care about.
I don't really care about "Halo: Combat Evolved", I need to beat it, but the CPU is making that game impossible because, the enemy keeps taking the vehicles needed to progress in the last half of that game, and I keep needing to shoot down the aircraft needed to progress with no way to repair damaged or destroyed aircraft. in my opinion they have bad level design and unmemorable at stages in that last part of that game. In 2 stages I think the only color they used is the color of blue.
In a memorable level in Duke Nukem 3D is called "Lunar Reactor" in the second episode where it plays my favorite Duke Nukem 3D for PC midi tune called "Alienz", while you are set out to destroy the earth moons reactor there is also has many bosses in that level depending of your difficulty setting there is more bosses on high difficulty.
What are some of your memorable and unmemorable levels or game stages, in levels I mean stages not leveling up.