The third of the direct-to-home movies;
Bender starts playing Dungeons & Dragons after lamenting that he has no imagination, but the roleplaying game begins to mess with his head. Meanwhile, the rest of the gang become swept up in Professor Farnsworth's plans to stop Mom's monopoly of dark matter. And that's just the tip of the weirdness iceberg...
- Annoying Arrows: Leela tries to kill Zoidberg's Cornwood counterpart, but her arrows do nothing more than annoy him.
- Anything That Moves: Amy's Cornwood counterpart, Gynecaladriel has the power to seduce anyone she wishes, this includes: a troll, a Morc, Greyfarn (Farnsworth), Titanius (Bender) and Leegolas (Leela).
- Armor-Piercing Question: During his interview with Mom, Morbo notes that despite her claim of losing money on her Dark Matter franchise, she's boasting record-breaking profits. Mom distracts him by offering him cookies.
- The Bad Guy Wins: Momon succeeds in claiming the Die of Power and destroys Cornwood. However this just thrusts everyone back to their original reality, where Mom gets defeated.
- Calling Your Attacks: Bender, on breaking into the Turanga's home, declares "prepare for a surprise attack!"
- Canon Immigrant: Unless you count a deleted scene in season one, Killbots first appeared in the Video Game. Though they were mentioned in episode four.
- Distracted by the Sexy: In a scene one orc-thing climbing a ladder while assaulting the castle catch sight of Gynecaladriel (Amy) taking off her top through a window. Cue abundant drooling, which happens to be acidic and burns through the ladder's steps, sending him falling.
- Dumbass Has a Point: Igner, on being found alone in the crap-farm, is asked if he's seen anyone.Igner: Me?Walt: Yes, you, you're the only one here.Igner: If I'm the only one here, then how could I see anyone?Larry: He's got a point, Walt.Walt: So does my knee! (kicks Larry)
- Eye Scream: Doctor Perceptron decides to drill through Bender's eye to get to his imagination circuits, despite there being a perfectly good access panel.
- Genius Ditz: Amy's status as this gets a note, when the Professor delivers a piece of exposition, and Amy angrily demands he stop patronizing everyone.
- Girl-on-Girl Is Hot: The alter-egos of Leela and Amy, Leegolas the Centaur and Gynecaladriel, the Queen of the Water Nymphos were making out because Leegolas saved Gynecaladriel's life, and Greyfarn and Titanius spare a moment from their task of saving the universe to watch.
- Gone Horribly Right: Roberto discloses his origins, that he was built by a team of scientists looking to build an insane robot. He maintains they failed, and will knife anyone who says otherwise.
- Hair-Trigger Temper: Leela's temper is at its worst here, with her dragging everyone along to a derby just because of some insults from rednecks.
- I Don't Like the Sound of That Place: Double Subverted with the Cave of Hopelessness.Frydo: Mr. Wizard, why is this place called the Cave of Hopelessness?Greyfarn: Oh, fear not, lad. 'Tis named for its discoverer, Reginald Hopelessness...Frydo: Whew!Greyfarn: ...the first man to be eaten alive by the Tunneling Horror.
- I'm a Humanitarian: Titanius Anglesmith has his dwarf subjects cooked for no real reason. He prefers them mildly crispy.
- Luke, You Are My Father: It turns out that Igner is Professor Farnsworth's son.
- Mook Depletion: Despite her son wanting to leave a small group of guards behind, Momon angrily demanded that all her forces be sent to invade Wipe Castle. Not only does it leave the Geysers of Gygax defenseless for Fry to sneak in, but thanks to a surprise attack by the centaurs, Momon's entire army was massacred.
- Nice Job Breaking It, Hero!: Nibbler accidentally clued Mom in on the connection between Nibblonians and Dark Matter.
- Off with His Head!: Zoidberg, in Cornwood, loses his head when Leela absently tosses her sword away.
- Potentially subverted as this doesn't actually kill Cornwood!Zoidberg; he just becomes a small squid-like thing that walks around on smaller tentacles.
- Only Sane Man: Fry, of all people, tells Leela to forget about the destruction derby. She ignores him.
- Poor Communication Kills: Ignus tries to help the group, only to get bogged down in a fight with Greyfarn. It's thoroughly lampshaded.Ignus: Please, I'm trying to help you!Greyfarn: Then why are you hitting me with a stick? How stupid are you that you think that's helping?
- Sanity Slippage: Bender, courtesy of playing Dungeons & Dragons.
- Sex Is Violence: Leela is forced to wear a shock collar to control her temper. Instead of becoming more docile, she ends up getting used to it and finding it pleasurable because she associates it with the fun of beating people up. In one fight in the movie she ends up on the ground writhing in pleasure.
- The title is one to Ender's Game
- The "Geysers of Gygax" in Cornwood, named after Dungeons & Dragons creator (and Futurama guest voice alumnus) Gary Gygax, who passed away during production. The movie is dedicated in his honor.
- The scene described under Distracted by the Sexy is a reference to Animal House.
- Shower Scene: One scene very early into the film takes place in a communal shower, where characters of both sexes shower together (Amy, Leela, Fry, Bender and Zoidberg). Glimpses of rears can be seen, however frontal nudity is obscured.
- Taxonomic Term Confusion:Ignus: (on a giant spider) Quick, jump on the magic bug!
Greyfarn: That's not a magic bug, you dope! That's a magic arachnid! Can't you count the legs?
Greyfarn: Six, seven, eight. Not six. Eight!
- Treants: In a direct parody of The Lord of the Rings, the fantasy quest featured a giant tree person called Treedledum. The fellowship ended up using him for firewood.
- Tyrannosaurus rex: The "humblest of all God's creatures", which stops an alien invasion in an episode of The Scary Door.
- Unexplained Recovery: Nibbler returns despite eating himself to escape the universe in "Bender's Big Score".
- What Happened to the Mouse?: The whole shock collar subplot, once the Coinwood Plot kicks in, is completely forgotten. Incidentally, Leela, when returned to the real world, is still wearing it, but it is neither referenced nor seen ever again afterwards.
- Whole Plot Reference: Well, not whole, but halfway the story shifts into something like The Lord of the Rings, complete with Fry's transition into a Gollum-esque character.