# OSE Advanced Fantasy

OSE Advanced Fantasy is a rules-lite OSR retroclone expanding Classic Fantasy with Advanced D&D options. Race-class separation, additional classes, and expanded magic bring 1E depth to B/X simplicity. Modular, clean presentation makes it ideal for players wanting classic complexity without the cruft.

## At a Glance

OSR/B/X + 1E lineage • d20 roll-under • 3-6 + GM • Low prep • Rules-lite • 2-4h sessions

## Why It Fits

A strong fit for groups that want fantasy adventure with a clear play identity, with class-based helping define the experience.

## Fit Facts

- Players: 3-6 players + GM
- Session length: 120-240 minutes
- Prep: Low

## Facets

- Genres: Fantasy
- Systems: Old-School Renaissance (OSR)
- Mechanics: Class-based, Exploration-Driven, Rules Lite

## Scores

- Complexity: 3/5
- New GM Fit: 2/5
- Roleplay Focus: 3/5
- Combat Focus: 3/5
- Tactical Depth: 1/5
- Campaign Depth: 4/5

## Best For

- Groups that want fantasy adventure with a clear play identity
- Groups that want place, travel, and discovery to stay central
- Players who enjoy danger, discovery, and player-driven problem-solving

## Avoid If

- You mainly want short standalone sessions with minimal carryover
- You want the system to stay almost invisible at the table
- You want a much breezier tone than this game is built to support

## Directory Notes

OSE Advanced Fantasy presents a classic high-fantasy world of dungeon delving, wilderness exploration, and stronghold building. The implied setting draws from decades of D&D tradition—mysterious ruins, perilous forests, and ancient magic waiting to be uncovered.

## Theme and Setting

Unlike the streamlined Classic Fantasy, Advanced introduces the complexity of separated race and class, enabling elven wizards, dwarven fighters, and halfling thieves as distinct combinations. The tone embraces pulp fantasy adventure where danger is real, treasure is the primary reward, and player ingenuity trumps character build optimization.

## How Play Feels

The game uses the familiar d20 roll-under mechanic for ability checks, attacks, and saving throws. Character creation offers significantly more options than Classic Fantasy: nine additional classes (acrobat, assassin, barbarian, bard, druid, illusionist, knight, paladin, ranger), separated race and class, and expanded spell lists including 6th and 7th level magic.

## What Makes It Distinct

The presentation follows OSE's signature "control panel" layout—each topic spans facing pages for instant reference. Encumbrance is tracked by item slots rather than pounds.

## Where It May Not Fit

You mainly want short standalone sessions with minimal carryover You want the system to stay almost invisible at the table.

## Links

- Directory page: https://www.ttrpg-games.com/item/ose-advanced-fantasy
- Agent JSON: https://www.ttrpg-games.com/api/games/ose-advanced-fantasy.json
- Publisher or official site: https://necroticgnome.com/products/old-school-essentials-advanced-fantasy-players-tome
- Reviews or retailer page: https://www.drivethrurpg.com/en/product/279411/old-school-essentials-basic-rules?affiliate_id=1659151