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.
Complacent Gaming Syndrome: Once people get to Level 45 or higher in Wii's online play, don't expect many of them to use anything else but Strata, Masterton, and Ivana. See Game Breaker below. Very rarely you'll see Anovas from high-level players and that's only due to the Ivana not being able to use the Grenade Launcher attachment.
The shootout in the Barcelona nightclub, with this playing in the background. It's quite the Ear Worm too
The tank mission, where the Russian Air Force BOMBS you!
Game Breaker: In the Wii version's online play, certain equipment you can unlock once you get your level to and past 45.
Level 45 grants you the Strata SV-400, a powerful SMG with a fast rate of fire. It's only con is it'll eat through ammo quickly which can be addressed with Hi-Cap Mag. There's a reason it's called a game changer.
Level 52 grants you the Masterton M-557, a fully automatic shotgun with a fast rate of fire. The only cons are the severe muzzle climb after firing for awhile and it's slow reload. The reloading can be addressed with Speed Loader. This weapon can utterly destroy a Black Box in a matter of just seconds. That's how powerful this gun is.
Level 53 grants you the Proximity Mine which will detonate once it detects any movement from enemies. It's only con is enemies can shoot your Proxy from afar or blow it up with their explosives if they see it. Since when you die you get your grenades and mines restocked, it basically guarantees two free kills per life.
Most would say use Minesweeper to counter this, but that only marks mines on your radar as tiny red dots and doesn't tell you if those mines are friendly or unfriendly. Also the time it takes to read the radar is the time somebody offs you.
Scrappy Weapon: In online multiplayer (Wii and Reloaded), the Sigmus is considered the worst weapon in the game (the AK-47 is able to be equipped with a grenade launcher) with a small magazine (20 bullets in a clip), poor damage, poor range, and poor accuracy. Since it's the only gun you have for custom class building when you begin online play at Level 1, most players ignore using the Sigmus in favor of the default loadouts (including the more favorable Sigmus 9 and Stauger) until they level up enough to unlock more guns and equipment to start custom loadout building.
That One Achievement: One combat accolade in Wii's online play, Injury to Insult, can be a royal pain to achieve as it requires you to kill enemies while you are blinded by Flash Bangs. The catch is kills toward Injury to Insult only count during the five seconds the white flash is on your screen due to a Flash Bang going off near you. Kills when your vision is blurry after the white flash fades do not count to Injury to Insult. If you want this accolade be prepared to run Distraction for a long time to blind yourself since Distraction is not a common gadget used by other players.
Being a remake of a classic, this was an inevitable outcome.
The changes to the story and the characters were not well received by some, either; Some choices made sense, such as the removal of Trevelyan's Cossack backstory, which just barely made sense at the point the original film was released, but others like Onatopp were altered to the point they were basically In Name Only versions of the characters. Partially justified in that the main writer of the script for the game also wrote one of the initial drafts of the film, later adjusted.
You can't use RPG in Online!
Boris does not return in multiplayer (though one of Zukovsky's mooks who shares the same name is playable).