Solo Sequence

In a party-based game or even multi-unit strategy game, a level or mission in which the player controls only one character - often the main hero on a solo escapade. Many RPGs will start in this mode before the hero meets other party members, so starting sequences don't count - but all further "one person left alone" sequences do. Doesn't count if the rest of the team isn't player-controlled but is AI-controlled and helps the player automatically, the character has to be really alone. Single duel-type fights have their own tropes, this is about a whole longer level to be completed with a single character.

Might be because the hero performed a Sneaky Departure; maybe This Is Something He's Got to Do Himself or In the End, You Are on Your Own; might be as a result of the whole team being involuntarily split, scattered across the world or even dying as a scenario requirement; might be a side character completing a quest/mission of their own.

Might lead to a Duel Boss (though just a solo fight, without a solo lead-in, wouldn't qualify for this trope).

See Solo-Character Run when it's the player that decides to play with only a single character, for the added challenge.


Examples:

Eastern RPG

First-Person Shooter
  • Annoyingly for a game based on tactically positioning your squadmates, Rainbow Six Vegas 2 has a segment where your squad goes off to join the first game's protagonist, leaving your character to complete a level which has more in common with Splinter Cell then anything else, made more difficult by the game's (relative) lack of stealth mechanics. This is the Scrappy Level for a reason.
    • Subverted by the ability to do this mission in co-op, making the level a lot easier.
  • Star Wars: Republic Commando generally has a Solo Sequence in every level (i.e. a proud total of three): on Geonosis, you start off alone but rendezvous with the rest of the Delta Squad shortly thereafter; the proper solo sequence on Geonosis comes when your squad boards the droid control center and has to disable four key systems simultaneously; in the second level, you spend almost the entire first half of it alone before reuniting with other Deltas; and in the final level, you have to go solo against a Geonosian nest because the other Deltas are already manning turbolaser turrets.

Massively Multiplayer Online Role-Playing Game
  • World of Warcraft uses this trope as well, with solo scenarios introduced in Mists of Pandaria.

Real-Time Strategy

Roguelike

Simulation Game
  • Ace Combat 5: The Unsung War has a single level that you have to complete without your three wingmen (and any weapons). Justified by the nature of the mission, namely, high-speed stealth recon.
    • Ace Combat Zero: The Belkan War has two sequences where you have to fly without a wingman: after Pixy deserts you in mission 12 and after he kills PJ in mission 18 and you have to duke it out with him in the most epic Duel Boss battle of the series.

Western RPG
  • Dragon Age: Origins has the Scrappy Level Fade, which the Warden has to navigate on their own, optionally freeing the rest of the party for the Final Battle of the level.
  • Some dungeons in Exile and Avernum have you choose a single party member to send in.
  • Both Knights of the Old Republic games have plenty of moments where you control either one party member or the main character alone. This includes the final battle in each game.
  • Mass Effect 2 has a few Shepard-only side missions available as DLC: "Normandy Crash Site", where Shepard has to wander the eponymous location alone, contemplating the deaths of the soldiers under his/her command; "Overlord", where Shepard has to fight the Final Boss alone after being thrown into Cyberspace while the rest of the squad are trapped; and "Arrival," where Shepard performs an espionage mission that ends in the destruction of a solar system. Also, a short genre-shift plot mission where you play as Joker.
  • In Planescape: Torment on a couple occasions. In one instance, it's because navigation of the area involves being repeatedly struck dead by lightning traps. The Nameless One is immortal (or rather, can come back to life indefinitely), so he can get past this, but is kind enough to tell his less-than-immortal teammates to not follow him in.