Level Scaling

tim-cain level-scaling system-design fallout arcanum outer-worlds encounter-design rpg-design

Abstract

Problem: Should RPG enemies scale to the player's level, providing constant challenge, or remain fixed, providing a sense of progression?

Approach: Tim Cain traces his evolving philosophy across four shipped games — Fallout, Arcanum, Temple of Elemental Evil, and The Outer Worlds — showing how each project shaped his thinking.

Findings: Pure fixed levels reward exploration and create satisfying power growth but can lead to trivial encounters. Full dynamic scaling destroys the feeling of progression and creates absurdities (level 15 raiders with retirement-grade loot). A "limited level scaling" system — enemies with a fixed min–max range that lock on first encounter — preserves both challenge and progression.

Key insight: The best system pins enemy levels to a designer-set range (X to Y) and locks them the moment the player first encounters them, rewarding both exploration and returning to tough areas later.

Source: https://www.youtube.com/watch?v=za5u4j6lc-w

1. Fallout: Pure Fixed Levels

Fallout used entirely fixed encounters. The military base was hard, the Shady Sands area was easy, and the northwest corner of the map housed the toughest content. If an area was too hard, you left, leveled up, and came back. Random encounters followed the same logic — tougher in certain regions, easier in others. Special random encounters (influenced by Luck) had no level gate at all.

This created a clear geographic difficulty gradient that rewarded exploration and gave players a strong sense of growing power.

2. Arcanum: Quest-Triggered Pseudo-Scaling

Arcanum's random encounters had designer-set power levels — still fixed. However, two wrinkles added variety:

2.1. Day/Night Variation

Some areas had different encounter tables for day and night. Certain regions became significantly harder after dark (similar to EverQuest's Kithicor Forest, where dangerous undead spawned at night). This wasn't true level scaling, but it forced players to plan their travel timing.

2.2. Quest-Triggered Encounters

Reaching certain main story milestones injected new encounters into the random tables. The Molochean Hand assassins, for example, were triggered by quest progression rather than location. Since the designers knew players would be higher level by that story point, these encounters were tuned to be very tough — and could appear anywhere on the map, even in otherwise easy areas.

Tim considers this "a form of level scaling" in the sense that the game acknowledged the player's progression through the story, but it was still fundamentally designer-controlled.

3. Temple of Elemental Evil: Back to Fixed

Temple of Elemental Evil returned to purely fixed encounters, for two reasons: it matched Tim's preference, and the source module demanded it. The original tabletop adventure was designed with clear difficulty tiers — Hommlet (easy), Nulb (harder), the upper Bandit Keep (early-mid), the Temple proper (progressively harder by depth), and the elemental planes at the bottom (very hard). Nothing in the game checked the player's level.

4. The Outer Worlds: Limited Level Scaling

The Outer Worlds introduced what Tim calls limited level scaling — his current preferred approach. Every creature encounter is placed with a level range from X to Y:

4.1. How It Works

  • Player level < X (minimum): Enemies stay at level X. The encounter is too hard; come back later.
  • Player level between X and Y: Enemies match the player's level. Fair challenge.
  • Player level > Y (maximum): Enemies cap at Y. The player has outgrown them and will find the fight easy.

4.2. The Pinning Rule

Once the player first encounters a group, their level is locked permanently. If enemies spawned at level 5 because the player visited at level 3 (below the minimum), they stay at 5 even if the player returns at level 6. However, if the player had never visited and first arrived at level 6, they'd spawn at 6.

This creates a meaningful reward for early exploration: visiting Monarch's abandoned town landing pad at a low level pins the raptidons there to the bottom of their range, making them easier when you return properly leveled.

4.3. Zone Progression

The X–Y ranges increase across later zones, so level designers can still create a clear difficulty curve. Early zones have low ranges, later zones have high ranges. Within zones, encounters also escalate — early fights are homogeneous (one enemy type), while later fights mix variants (spitters, chargers) at higher levels with more hit points and additional attacks.

5. Why Full Dynamic Scaling Fails

Tim explicitly rejects systems where enemies always match the player's current level. Two problems:

  1. It destroys progression. Fighting a level 5 raider, leaving, gaining 10 levels, and returning to find a level 15 raider removes any sense of growth.
  2. It creates absurdity. A level 15 raider with top-tier equipment and massive stats should logically be able to sell one gun and retire — not be scraping by as a roadside bandit.

6. Tim's Final Position

Limited level scaling with designer-set ranges and encounter pinning is Tim's preferred system going forward. It balances challenge, progression, designer control, and exploration rewards — solving the core tension between "constant challenge" and "earned power fantasy" that defines the level scaling debate.

7. References