These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The Shock Rifle combo. Covers a huge area and normally results in OHKs.
The Sniper Rifle. It has a relatively fast rate of fire, deals a lot of damage, and your target generally has no idea where you're shooting from. There's a reason of why it got nerfed in later installments.
The Rocket Launcher in the console games. While you must keep the crosshairs on your target for half a second to activate the homing system, this delay gets even more shortened, so you have a greater chance to home your missiles in onto your enemies.
Memetic Mutation: It's safe to say that each voice taunt or announcer voice was subjected to this, at least once. Especially those of Xan Kriegor:
M-M-M-MONSTER KILL!!! Kill!! Kill!
I am the Alpha and the Omega!
Witness my perfection!
More Popular Spin-off: This game is the most remembered game of the Unreal franchise. We'll forgive you if you don't know that this was a spinoff.
Most Annoying Sound: You would want to turn off the announcer after hearing it for many matches. The famous "Headshot!" and "Killing Spree" sounds are so overused, that it's basically, a lead acetate version of Tastes Like Diabetes.
Porting Disaster: Even with the games featuring new arenas, the PlayStation 2 and Sega Dreamcast versions weren't well received. Some of the maps run slow as hell, using a controller is not recommended, (though both consoles have keyboard and mouse support) and many of the new maps don't have an interesting layout at all. Plus, the health bar in the GUI doesn't show the amount of health the player has if it's over 100 points.
The final match. The stage is Hyperblast, Xan's ship. Large, semi-confusing, Xan's love of shock rifles knocking you into space, and the low-gravity. You WILL hate this level.
Due to your teammates being incredibly retarded and the fact you can't be everywhere at once, any CTF level in single player quickly becomes an irritating hassle.
DM-KGalleon. It's extremely intrincate, with lots of obstacles, some weapons are in places which are hard to reach, and some passages are extremely narrow. Couple this in single-player with the fact that the "weapon stay" preferences are off, (this means that once someone pick up a weapon, everyone have to wait X seconds for it to respawn and take it again) and that the bots will be more focused on shooting you than their enemies, and you've got a huge challenge, probably even huger than the final match.
The console version of the map lacks the lower floor, so it becomes somewhat easy, averting this trope. Of course, when you pair it with the issues mentioned in Porting Disaster, well... it becomes again a hard match.
Tough Act to Follow: To such extent that any Unreal game afterwards is received with a lot of flak.