It is premised on the idea of a vampire who is effectively immortal, with death simply forcing them into slumber for a 100 years, after which they wake up to feed again. This means that every level of the game is a whole new century, with the corresponding advancements seen amongst your opponents...or not.
After all, each time you awaken you get to choose which of that period's prominent people's to feast on. Many of those would have driven humanity to advance further if they survived, so letting them live results in more technologically advanced timelines, whereas trying to sow as much chaos as possible keeps humanity down. On Meanwhile, Dracula is always out there, and you are driven, above all, by the goal of taking him down and claiming your rightful place as the king of vampires.
Tropes present in Immortal Rogue:
- After the End: One of the timelines sees a nuclear war occur near the end. As you awaken, you are faced with this: Nuclear conflict has left the world an Irradiated Wasteland. A Scavenger looks for lost ways to purify water in the ruins of the old world. You can then choose to hunt him, turn him, or hunt the ruin dwellers instead.
- A.I. Is a Crapshoot: Robots intent on wiping out humanity may appear in the high-development timelines. You can help humans fight them...or you can hunt the one person who would have been able to Nuke 'em.
- Attack Drone: These are present in some timelines.
- Bare Your Midriff: The clothing worn by Warlord Koguta on her conversation icon. However, her in-game combat sprite appears fully encases in knight's armour.
- Bottomless Magazines: Averted with a Crossbow, which only has a single bolt, and it must picked up after you fire it. (Unless you got the Bound Blade power to make it come back.)
- Blade on a Stick: There are multiple spear-wielding enemy types.
- Boomerang Comeback: Bound Blade power does this for thrown heavy weapons.
- But for Me, It Was Tuesday: When you finally confront Dracula, he says "I don't recalling making you. I doubt I'll recall unmaking you either."
- Charged Attack: Pressing as opposed to tapping unleashes these attacks from your heavy weapons. They also reset combo cooldowns.
- Combos: Every weapon has a combo associated with it. It usually consists of three hits, but some have two-hit or four-hit combos. They normally have a cooldown associated with them...unless you dash or pull off a heavy attack, which resets said cooldown.
- Evil Is Easy: While it's questionable if an immortal vampire can ever be considered a force for good, specifically acting in a destabilising manner so that the humanity will fail to advance for as long as possible (and eventually bomb itself back into Stone Age due to a nuclear war) definitely makes things easier for you than letting stability and development prevail, with humans fighting back with more advanced munitions as an inevitable consequence of that.
- Flash of Pain: Damaged enemies flash red, while your entire screen flashes red if you get hit.
- Kick the Dog: Even if the world has already been plunged into a post-nuclear wasteland, you can still choose to make things even worse. A particularly nasty example is being faced with a slave trying to stage a rebelling against the slavers, and choosing to hunt him instead of the slavers.
- One-Way Visor: More advanced ages feature the enemies who wield energy weapons and wear these.
- Ray Gun: Letting the world develop into more stable and advanced timelines has you face futuristic soldiers who wield these.
- The Revolution Will Not Be Civilised: Some timelines see the emergence of industry in the cities, but with the associated grime and pollution as a consequence. A revolutionary is unhappy with that state of affairs and wants to blow up the Capitol. You can kill or turn him, thus allowing the advances to continue, or you can secretly help him by feasting on the capitol residents, so that between you and his bomb all of the government is wiped out, plunging the place into complete chaos.
- Shield Bash: You can do this by equipping a Greatshield as your heavy weapon.
- Shield-Bearing Mook: There are armored knights that are almost completely covered by their huge oval shields, and are only exposed for an attack when they take a swing with their axes.
- Short-Range Shotgun: Played straight with the shotguns wielded by some of the enemies.
- Sword Lines: Bright blue flashes demarcate the reach of both your swings, and those of the enemies.
- Throwing Your Sword Always Works: One of the combo moves has you throw a spinning sword, which then travels in a circle. However, it'll only come back to you if you have unlocked a requisite power beforehand.
- Transhuman Treachery: The defeated human minibosses you choose to turn rather than finish off will engage in this. Eventually, some will outright say they no longer remember what it was like being one of "them".
- Video Game Caring Potential: Selecting your feeding targets in order to minimise disruption to societal development and turning, rather than bleeding dry, your targets, would count as this.
- Video Game Cruelty Potential: Alternately, you can go for the opposite and end up the only vampire left standing in a world devastated by nuclear war and/or cleansed of most other organic life by the rebellious AI.
- Video Game Dashing: The only movement type in the game. Moreover, it resets the cooldown between combos, thus encouraging you to chain them together.