gcloud run revisions list \
  --service $SERVICE --region $REGION \
  --filter="status.conditions.type:Active AND status.conditions.status:'False'" \
  --format='value(metadata.name)' \
| tail -n +${N+1} \
| xargs -r -L1 gcloud run revisions delete --quiet

We’ve got three variables to replace:

• Name of the service
• Region our service is located in
• How many “older” Revision than the active ones do we want to keep