"Could not find a valid gem in any repository" (rubygame and others)

I have fixed this issue using the proxy command option of gem install. It has the following format:

$ gem install --http-proxy

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rubygame

Note, the IP address and the port number refers to a proxy. You should search for a proxy list and use one of the proxies there.

This is site with proxies:

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Also, I have to try 7 or 8 different proxies in order to succeed. Do not give up.

You don't have an Internet connection to rubygems.org.

This happens sometimes if the site is down or blocked.

This command can show you if your connection has a way to reach rubygems.org:

traceroute rubygems.org

You can also add the source you want on the command whenever you have troubles using https, like this:

gem install GEMNAME --source

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It's better to fix the SSL problem though.

check your DNS settings ...I was facing similar problem ... when I checked my /etc/resolve.config file ,the name server was missing ... after adding it the problem gets resolved

I know this is a little late, but I was also having this issue a while ago. This is what worked for me:

REALLY_GEM_UPDATE_SYSTEM=1
sudo gem update --system
sudo gem install rails
Hope this helps anyone else having this issue :)

are you behind any proxy?

check your browser for proxy that you might use:

execute the command: `gem install xxx --http-proxy=http://user:password@server` and you should be good to go.

Maybe you should try

gem list -r

then

gem install -r rubygame

Also note that with `rvm`on MacosX (Lion in my case) you should install `ruby-1.9.3-p194` (for Xcode 4.x compiler considerations) then

rvm rubygems current

and in my case I had to use

rvm use ruby-1.9.3-p194@global

(which contains `bundler`, `rake`, `rubygems-bundler`and `rvm`)

and not

rvm use ruby-1.9.3-p194

(which is empty)

For what it is worth I came to this page because I had the same problem. I never got anywhere except some IMAP stuff that I don't understand. Then I remembered I had uninstalled privoxy on my ubuntu (because of some weird runtime error that mentioned 127.0.0.1:8118 when I used Daniel Kehoe's Rails template,

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[never discovered what it was]) and I hadn't changed my terminal to the state of no system wide proxy, under network proxy.

I know this may not be on-point but if I wound up here maybe other privoxy users can benefit too.