Yet Another SFCave home page
Entertainment, Games, Video Games, Action, Freeware - Yet Another SFCave. Fly through a tunnel without hitting the walls.
https://yasfcave.sourceforge.net/
GMonsters
Entertainment, Games, Video Games, Action, Freeware - Gmonsters. Train, breed, and battle monsters for Gnome.
https://gmonsters.sourceforge.net/
Lupengo for Linux
Entertainment, Games, Video Games, Action, Freeware - Lupengo. Arcade game for Linux.
https://lupengo.sourceforge.net/
BZFlag - home
Entertainment, Games, Video Games, Action, Freeware - BZFlag. A multiplayer 3D tank battle for Irix, Linux, Solaris, or Windows.
https://www.bzflag.org/
XTux homepage
Entertainment, Games, Video Games, Action, Freeware - XTux Arena. A client server network game for X11 featuring opensource mascots.
https://xtux.sourceforge.net/