What are the best practices for logging in games?

Log the context that helps diagnose problems, key state, important actions, the path leading to events, rather than noise, since logs are only useful if they capture what matters and the goal is a useful trail of what the game was doing so you can see how it got to a crash. Capture logs and breadcrumbs from the field, attached to crashes when they happen, since logs on your machine don't help with crashes on players' devices, and field breadcrumbs show you the path to a crash on the player's device, often the key to understanding a crash you can't reproduce. And avoid logging so much that the signal is lost, log what's meaningful, not every detail, since over-logging buries the useful information in noise and costs performance. Good logging gives you the breadcrumbs to understand what happened before a crash, which is often the key to fixing it, so the practices serve logging meaningful context (for diagnosis), capturing it from the field (where the crashes you need to understand actually happen), and keeping it focused (so the trail is readable and useful), which together provide the trail of events that makes crashes and bugs diagnosable, especially the ones you can't reproduce.

How does logging help with crash diagnosis?

Logging provides the trail of what happened before a crash, the breadcrumbs of state and actions leading up to it, which is often the key to understanding and fixing a crash, especially one you can't reproduce. A stack trace tells you where a crash occurred, but not how the game got into the state that caused it, and for many crashes the path matters: what the player did, what state the game was in, what sequence of events led to the failure. Logs and breadcrumbs capture that path, so when a crash happens you can reconstruct the lead-up and see the conditions and actions that triggered it, which frequently reveals the cause that the stack trace alone doesn't. This is especially valuable for crashes you can't reproduce: since you can't recreate the crash to observe it, the captured breadcrumbs showing what happened before it on the player's device are often the only window into how it occurred, letting you diagnose it from the trail rather than from a repro you can't get. For logging to help with real crashes, the logs and breadcrumbs have to be captured from the field (attached to the crash when it happens on the player's device), since logs on your own machine don't reflect what happened on the player's device where the crash occurred, and they have to be focused on meaningful context (not noise), so the relevant trail is readable rather than buried. So logging helps crash diagnosis by providing the contextual trail, the breadcrumbs of what led to the crash, that complements the stack trace and is often what makes a crash understandable and fixable, particularly the unreproducible ones where the captured trail substitutes for a repro you can't get.

What should I log in my game?

Log the meaningful context that would help you understand what happened before a problem: key state changes, important player actions, significant events, transitions, and the path leading to potential failure points, the kind of trail (breadcrumbs) that lets you reconstruct how the game got to a crash or bug. The goal is a useful, readable record of what the game was doing, focused on the information that aids diagnosis rather than exhaustive detail. Avoid two failure modes: logging too little (so when a crash happens, you have no trail of what led to it and can't diagnose it) and logging too much (so the useful signal is buried in noise, the logs are hard to read, and performance suffers from excessive logging). The right level is meaningful breadcrumbs, enough context to reconstruct the lead-up to a problem, without spamming every minor detail. Critically, what you log should be captured from the field and attached to crashes when they happen, since logs on your own machine don't help with crashes on players' devices, you need the breadcrumbs from the player's actual session leading to the crash. Capturing breadcrumbs (meaningful actions and state leading to a crash) automatically with each crash gives you this trail without manual logging effort, and is often what makes a field crash, especially one you can't reproduce, diagnosable, since the breadcrumbs show how the player got to the crash. So log the meaningful context (state, actions, events, the path to failure points) that helps diagnosis, keep it focused (signal over noise), and ensure it's captured from the field with crashes, which together give you the useful trail that makes crashes and bugs understandable and fixable.

Best Practices for Logging in Games

Quick answer: Log the context that helps diagnose problems, capture logs and breadcrumbs from the field, and avoid logging so much that the signal is lost. Good logging gives you the breadcrumbs to understand what happened before a crash.

Logging done well gives you the trail of what happened before a problem, which is often what makes it fixable. Here are the best practices for logging in games.

Log the Context That Helps Diagnose Problems

Logs are only useful if they capture what matters, so log the context that helps diagnose problems, key state, important actions, the path leading to events, not noise. The goal is a useful trail of what the game was doing, so when a crash happens you can see how it got there.

Bugnet captures breadcrumbs, the trail of actions leading to a crash, with full context. Logging the context that helps diagnosis is what makes logs valuable, since a log of meaningful state and actions is what lets you reconstruct what happened before a problem.

Capture Logs and Breadcrumbs From the Field

Logs on your machine don't help with crashes on players' devices, so capture logs and breadcrumbs from the field, attached to crashes when they happen. Field breadcrumbs show you the path to a crash on the player's device, which is often the key to understanding a crash you can't reproduce.

Bugnet captures breadcrumbs from the field with every crash, so you see the path to the crash on the player's device. Capturing logs and breadcrumbs from the field is what makes logging useful for real crashes, since the trail you need is on the player's device, not yours.

Avoid Logging So Much That the Signal Is Lost

Logging everything buries the useful information in noise and costs performance, so avoid over-logging, log what's meaningful, not every detail. Focused logging keeps the trail readable and useful, so you can find what matters rather than drowning in irrelevant log spam.

Bugnet's breadcrumbs focus on meaningful actions, keeping the trail useful. So practice logging in games by logging the context that helps diagnosis, capturing logs and breadcrumbs from the field, and avoiding over-logging, giving you a useful trail of what happened before a crash without burying it in noise.

Log the context that helps diagnose problems, capture logs and breadcrumbs from the field, and avoid logging so much that the signal is lost. Good logging gives you the breadcrumbs to understand what happened before a crash.