If I understand you correctly, then you can add them to "Tools" (http://www.lgdb.org/list_tools) section (see http://www.lgdb.org/tool/sludge for example). Of course we could add separate section "Game Making tools", but I think there aren't too much of such a tools currently.
However, what we can do is to add "Game Making" category within "Tools" (now game making stuff goes under Miscellaneous category). Let's see what pheonton thinks.
Maybe we could add a category to tools like.. "Game maker" ?
But how many game makers have Linux versions? So far I only found Stencyl, which creates flash games..
The greenish screenshots are *really* old, at least 8 releases and something like 4 years old.
Game: Stunt Rally
Split screen multiplayer on the same computer can be found from the latest 1.2 release. Networked multiplayer is slowly being worked on as a separate branch - the issue tracking its progress is here: http://code.google.com/p/vdrift-ogre/issues/detail?id=16
Game: Cave Story
Thanks for the link, added it.
By the way, I'm currently stuck on Ballos :)
Upd: Hooray! Finished it!