I've failed to find many threads about Hetzner, and none where people have hosted gameservers. On their site they say they're suitable, their bandwidth looks pretty good, and ping/speeds to sites on their network seem brilliant.
But will that reflect in a gameserver? I've always found that ping to a site is a whole different story to a gameserver, especially during peak/etc, has anyone got experience with Hetzner, is the bandwidth good and can you push a reasonable amount? (50+ players at once on the whole server, but each takes very little bandwidth I believe, source based games).
Ι don't use hetzner for gameservers, only for webhosting. They have fast and stable network with low latency and very helpful staff. There is an unofficial IRC channel on Quakenet ( #hetzner) where I believe you can get more replies to your question.