* DemonicSpiders: Bishops, the boogeyman mobs that [=GMs=] sometimes threaten to feed misbehaving players to (and specifically warn about in the version 2.2 shop-skill descriptions). They also float around freely in the map called G-ark inside a swarm of missile mobs with itchy trigger fingers (most of the time firing more missiles then you can roll without the I-Gear only Chain Rolling skill). They are "farmed" regularly by some servers.
** As of Episode 3, the mobs of the newly-uncovered Pandea maps are nearly [[EverythingTryingToKillYou all aggressive]] and farsighted (aggro at 2km, well out of a player's weapon lock-on range), relentless, and have monster levels starting in the 70s (although lv 68+ B-Gears can grind in the ANI Atus map if they have high probability weapons). Players who aren't either daring, skillful, or [[LeeroyJenkins suicidal]] only enter Pandea with the help of '''Stealth Cards'''.
*** Feathering and barrel rolling or a damage output that allows you to kill mobs one by one before they can attack you are all that is required to survive in these maps.
*** Most players would not waste Stealth Cards on Pandea maps, typically saving them for the aforementioned bishops.
*** Most mobs do not aggro from far away, but some, such as the Bonebat recolours and certain Vatallus attack craft, which ''have'' been observed to acquire players as their targets from as far as 1700-2300m. Even then, their attack range is not as far as their lock-on range.
*** This seems to have been inverted with the newest Pandea maps. Despite being 10-20 levels higher than in the previous maps, most of the mobs die quickly and don't aggro players. You might even go as far as to call it a BreatherLevel.
* GameBreaker: Any [[color:Purple: Legendary]] weapon. To this day, there also still exists some in-game bug exploits that rogue players will use to disrupt gameplay (one-hit shots on major in-game bosses, etc).
** ''Any'' [[color:Purple: Legendary]] Weapon? Try a weapon like [[http://www.acecalcs.net/wpndirect.htm?weapon=BU0K4A000a00005500040300505 this]].
** A-Gears can even be more broken if you know how to do [[https://www.youtube.com/watch?v=HmMWGCdhg9s&fmt=18 a backshot.]]
** More mundane upgrades that make players cry foul include '''Advanced Weapon Speed Cards''' (which make missiles fly faster), '''[[http://i99.photobucket.com/albums/l302/Chris_Lv255/comparisonview.jpg Engine Cards]]''' (which can improve a player's engine well beyond it's normal abilities, if you get lucky and succeed in enchanting your engine several times), and any weapon which has a ridiculous quick-fire bonus (e15 Bigsmash/Arrow with a grand total of -60% reattack thanks to superior fixes, anyone?).
*** Nearly everybody has a weapon with at least decent quick-fire or damage bonuses. 5% is not that much of a difference.
*** Additionally, '''pierce cards''', which make a weapon's damage bypass even more armor than normal.
*** '''Radar''' cards, that let you enhance weapon acquisition range so you can try to hit stuff from even more ludricous distances than normal, may also began annoying players once they get sniped repeatedly by I-gears from 1900m and beyond.
*** Final skills often add large bonuses compared to previous skill levels. Final [[https://www.youtube.com/watch?v=LsEuzX1yV2M siege mode]], for instance, can actually triple a gun's rate of fire. Balanced somewhat by the amount of LevelGrinding needed to get these skills.
* MemeticMutation: Back in the ''Space Cowboy Online'' days, GM Xarfox had generated a meme in which ''there's light at the end of the tunnel.'' SCO closed a few months after that.
* PlayTheGameSkipTheStory: How many players actually ''bother'' to read the background story about the colonisation of the Phillon Planet, the defection of Arlington, and the sinister machinations of the Shrines?
*** The fact that you have nothing to do while playing a video game means the story must be incredibly terrible.
* ThatOneBoss: When a player talks about Bishops, he almost always means [[InstantDeathRadius Bishop Red]].
** Sekhmete, which might as well be using Berserker.
** In Pandea's middle-ground field, Sunshine Born, the Boss there is fully capable of delivering a crushing 10,000-point attack. Even an overbuffed M-gear with 300 Defense and buffs with be smarting after such a powerful strike.
** And those are nothing compared to the new [[BossRush Infinity Field]] [[OurDragonsAreDifferent bosses]]. ''No one'' has made it to the fifth boss without GM assistance.
*** The [=GMs=] stated that the second IF instance would have even nastier bosses, although this turned out to be [[BreatherBoss a bit of an exaggeration]].
* ThatOneSidequest: Ruler of Eopi. You have to kill a high level boss that only spawns every 24 hours. Most players will never even ''see'' it.
** That's not half of the problem: The map is a bonus map available for winners of a mothership war. In an unbalanced server where one side keeps losing, the map is rarely available. Also, that mission is the last in a string of missions that deposit items that ''cannot be removed from inventory''. Supposedly, it is used to make powerful weapons. In truth, all except one is useless, so that mission is very much required just to get rid of said items.