Jaeger
A CNCF graduated open-source distributed tracing platform that ingests OpenTelemetry and OTLP traces, showing request paths, latency, errors, service dependencies, and multiple storage options.
Why use it
Problems across multiplayer, identity, matchmaking, or economy services can be followed from one slow request to the responsible span and service.
Where it fits
Use analytics, feedback, player support, and updates to fix issues and decide what to improve after launch.
What to check
It is not a complete replacement for logs and metrics; govern sampling, storage, retention, and sensitive span attributes, and expect limited value for small monoliths or offline games.