Fun vs. Realism

tim-cain game-design system-design design-pillars fun realism fallout outer-worlds arcanum

Abstract

Problem: When designing game systems, how should developers prioritize fun versus realism when the two conflict?

Approach: Tim Cain draws on his experience shipping Fallout, Arcanum, and The Outer Worlds to examine the tension across movement, hit points, economy, and rule consistency.

Findings: Fun should always be the top design priority. Realism matters but ranks third or fourth. Players selectively complain about unrealism only when it hurts them, not when it helps — making "realism" an unreliable design compass. Consistent, fun rules beat realistic ones.

Key insight: "Fun trumps realism" should be an explicit design pillar. If someone argues a mechanic is unrealistic but it's fun, keep it.

Source: https://www.youtube.com/watch?v=TshXDFgfiTg

1. The Joy of Movement

Tim opens with movement as the easiest example of fun beating realism. In almost every RPG, characters run far faster and jump far higher than any real human — faster than Usain Bolt, and for much longer. An old boss of Tim's called this "the joy of movement" and considered it a deliberate positive.

Nobody has ever complained that unrealistic jumping "ruined the game." This universal acceptance proves that everyone already agrees fun trumps realism — they just don't always realize it.

2. Hit Points: The GURPS Problem

When Fallout was originally built under the GURPS license, characters had roughly 10 hit points tied to their Health stat — and that number never grew. This created two major problems:

  • No power progression. Characters couldn't feel progressively stronger. The only way to improve survivability was better armor (damage threshold and resistance), which felt flat.
  • Binary combat. Instead of the D&D experience of watching health gradually drain and making tactical decisions (heal? flee?), GURPS combat played out as: dodge, dodge, dodge, dodge — one hit and you're nearly dead. Getting hit also penalized all your skills, creating a death spiral.

A team member pointed out that movies show heroes shrugging off injuries — and the GURPS version of Fallout couldn't deliver that fantasy. The team considered splitting health and hit points using optional GURPS rules, but ultimately went a different direction entirely and dropped GURPS.

3. Economy: Let Players Be Rich

Tim previously discussed how hard it is to balance game economies. His stance: money sinks (repair costs, sleeping fees, consumables) are often avoidable — players make monks who don't need weapons, sleep in their own house, or play on easier difficulties. Rather than fighting this, Tim embraces it.

If players end up with a million coins at the end of the game, that's fine. The goal is a fun game, not a realistic simulation of scarcity.

4. The Hypocrisy of "Realism" Complaints

Players often complain about a lack of realism — but only when it hurts them. Tim gives the Arcanum example: players complained that merchants "magically" knew items were stolen (forcing you to find a black market fence). But those same players save-scummed to pick the lock and fast-traveled away with the loot — both wildly unrealistic — without complaint.

This selective outrage is why Tim always defaults to the fun trumps realism principle: players don't actually want realism; they want things that feel good.

5. Design Pillar: Fun Trumps Realism

Tim believed this so strongly that "fun trumps realism" was the first design pillar of The Outer Worlds. When team members argued something was unrealistic, Tim's response was simple: "If it's fun, we're keeping it."

The science weapons in The Outer Worlds are a perfect example — an anti-gravity gun, a shrink ray, the Face Rearranger (which started as a joke). Realism never entered the conversation. Only fun.

5.1. Tim's Priority List

If forced to rank his design values:

  1. Fun — always first
  2. Something else (Tim couldn't quite name it — but not realism)
  3. Possibly realism — "third or fourth," maybe even lower ("tertiary... quinary")

6. Practical Recommendations

For aspiring game designers, Tim's advice:

  • Make your rules and stick to them. Don't worry whether they're realistic, pro-player, or anti-player. Just ask: is this rule fun?
  • Keep rules consistent. If the player can do something, NPCs should generally be able to do it too. Inconsistency kills fun. (Small exceptions are fine when they serve fun — e.g., players can knock out NPCs, but NPCs shouldn't knock out players.)
  • Embrace exploits. If players discover an exploit, let them enjoy it. Tim worries far more about a valid character being unable to finish the story than about players breaking the economy or making every faction love them.
  • The bottom line: When designing a game, always ask "is this fun?" Everything else is secondary. Realism is tertiary at best.

7. References