How do I prevent startup crashes in my game?

Harden the boot path, test it broadly, and monitor it. Make startup robust against bad or missing data, since many startup crashes come from the game assuming a save, config, or resource is present and valid when it's missing or corrupted, handle those cases gracefully rather than crashing. Test the first launch specifically on real varied devices including low-end ones and different OS versions, since startup crashes are often device- or environment-specific and hide where your dev machine can't see them. And capture startup crashes from the field with full context, since a startup crash locks the player out entirely, so catching and fixing it fast prevents it from continuing to lose you new players. The boot path is the one code path every player must pass, so it deserves this attention.

Why does my game crash on startup for some players but not me?

Because startup hits the widest range of real-world conditions and your dev environment is just one of them. A startup crash is frequently triggered by something specific to the player's situation, a corrupted or missing save or config, an OS version or permission quirk, a missing device capability, that simply doesn't occur on your machine where everything is present and configured as the game expects. Startup is also the least forgiving code path, often assuming a clean valid state. This is why startup crashes can hit many players while never appearing for you, and why prevention combines hardening startup against bad and missing data with capturing startup crashes from real players, whose device and OS context usually reveals the environment-specific trigger.

Why are startup crashes especially bad?

Because the player never even gets into the game, so a startup crash costs you the player entirely, not just a bad moment. A crash mid-session is frustrating but the player has at least experienced the game and may continue; a startup crash means they launch, it fails, and they have nothing, no gameplay, no reason to retry, and often a one-star review citing 'won't even start.' It also tends to affect everyone on a given device or environment consistently, not intermittently, so an affected player is locked out until you fix it. This is why startup crashes are high-priority to prevent: each one is a fully lost player, and capturing them from the field lets you catch and fix them before they lock out many more.

How to Prevent Startup Crashes

Quick answer: Make startup robust against missing or bad data, test first launch on real varied devices, and capture startup crashes from the field. A startup crash loses a player before they ever play.

A startup crash is the worst kind, the player never even gets into the game, so it costs you the player entirely and often a one-star review. Preventing startup crashes is high-priority. Here's how to prevent startup crashes.

Make Startup Robust Against Bad or Missing Data

Many startup crashes come from the game assuming something is present or valid at boot, a save file, a config, a resource, that's missing or corrupted. So make startup robust: handle missing, corrupted, or unexpected data gracefully rather than crashing, since the first launch hits the widest range of conditions and the least forgiving code path.

Bugnet captures crashes with breadcrumbs and context, so you can see what the game was doing when it crashed at startup. Hardening the startup path against bad data prevents a large class of startup crashes, the ones triggered by the varied, imperfect environments real players launch into.

Test First Launch on Real, Varied Devices

Startup crashes are often device- or environment-specific, a missing capability, an OS quirk, a permission, that your dev machine doesn't exhibit. So test the first launch specifically on real varied devices, including low-end and different OS versions, since that's where startup crashes hide and where they'll hit real players on day one.

Bugnet captures crashes with device and OS context, so startup crashes that cluster on specific environments are identifiable. Testing first launch across real devices prevents the device-specific startup crashes that your single dev environment can't reveal but that lock real players out of the game.

Capture Startup Crashes From the Field

You can't test every launch environment, so capture startup crashes from the field with full context. Since a startup crash means the player can't play at all, catching and fixing it fast prevents it from continuing to lock out new players, every one of whom is lost until it's fixed.

Bugnet captures crashes from real players automatically, including at startup, with device, OS, and version context. So prevent startup crashes by hardening startup against bad data, testing first launch on real devices, and capturing field crashes, protecting the boot path that every player must pass through.

Make startup robust against bad or missing data, test first launch on real varied devices, and capture startup crashes from the field. The boot path is the one every player must pass, and a startup crash loses them entirely.