The game follows intergalactic hero Serena S after saving the galaxy once again. Deciding to brag about her exploits on Spacebook, she soon finds her post plagued by a troll: The Space Prince. Not one to let this slight stand, she proceeds to track down the Space Prince so that she can kick his ass for trolling her.
Ultonius: A Tale of Petty Revenge contains examples of:
- Action Girl: The protagonist, who will gladly blast away as many creatures as she can to avenge the pettiest of slights.
- Affectionate Parody: Of campy science fiction stories like Flash Gordon.
- Badass Cape: One of the upgrades you can buy, which lets you take one more hit than usual.
- Big Bad: The Space Prince.
- Disproportionate Retribution: As noted above, the entire game is all about Serena hunting down some guy who trolled her over the internet.
- Giant Enemy Crab: The second boss.
- Groin Attack: Serena gives the Prince a quick punt to the nuts once she gets to him.
- Lethal Lava Land: The fourth stage of the game takes place in a cavern filled with lava.
- Multiple Endings: There are two endings depending on whether or not you managed to get Balzac all the way to the end of the game.
- If you didn't, Serena kicks the Prince in the junk and is soon surrounded and apprehended by his security force.
- If you did, Serena kicks the Prince in the junk and is soon surrounded by his security force only for Balzac to rescue her via spaceship, and the two proceed to the final level, where they fight through the Prince's forces and finally the Prince himself in a Humongous Mecha.
- Retraux: The game is a remake of a 1987 Spanish computer game called Phantis (also known as Game Over II). Beside the premise - Serena wants to punish a guy, not save him - most setpieces and enemies are remarkably faithful.
- Robot Buddy: Balzac, Serena's robot sidekick who you can occasionally find trapped behind some sort of obstacle that you can help him out of. Getting him all the way to the end not only gets you a spacesuit, but also the Golden Ending.
- Spoof Aesop: The epilogue of the Golden Ending states that the moral of the story is that one day, trolls might just piss off someone who can totally wreck their shit. Until then, keep trollin'.
- Stay in the Kitchen: The Prince trolls Serena by asking her what she's doing out of the kitchen. This proves to be a bad idea.
- Stripperiffic: Serena wears what is essentially a space bikini. If she saves Balzac all the way to the final stage, he'll give her a proper spacesuit, which includes the prompt "Dignity obtained".
- Stylistic Suck: Spacebook is portrayed as using an interface fit for computers of the 80's.