An unique set of actively developed open source games ported to PowerPC Macs running Leopard (with some minor [untested] support for Tiger).
These only had binary Intel builds, so after some heavy treatment, they fit right at home.
Xonotic - 0.8.2
http://www.xonotic.org/
An arena first-person shooter based on Nexuiz, with multiplayer support. (Client and Server included)
The current version is pretty GPU heavy, so this will work best with a G4 or G5 with a higher end card.
http://fox.furcode.co/macOS/PPCCollection/games/xonotic-0.8.2-ppc-darwin.zip
SHA1=50d05c030b9f1548d8e70c148df0dff569b4e6e5
Teeworlds - 0.6.4
https://www.teeworlds.com/
2D multiplayer side-scrolling shooting game based around cartoon physics. (Client and Server included)
Actually works quite nicely on even slower machines, and is buttery smooth on a Ti PowerBook G4!
http://fox.furcode.co/macOS/PPCCollection/games/teeworlds-0.6.4-ppc-darwin.zip
SHA1=dbfaeb54efb96f62c80ee3783e03b4039f61f006
Colossal Cave Adventure - 2.5
https://gitlab.com/esr/open-adventure
Fan of the original text-based adventure game? This is for you!
This was already released as part of another thread, but it may as well be thrown in here.
http://fox.furcode.co/macOS/PPCCollection/games/openadventure-2.5-ppc-darwin.zip
SHA1=ae10f0b12df16e03b3e1464fbef2dedf12184e69
This is a project I'm actively working on, so there are more games to come (and posted to this thread over time)!
These only had binary Intel builds, so after some heavy treatment, they fit right at home.
Xonotic - 0.8.2
http://www.xonotic.org/
An arena first-person shooter based on Nexuiz, with multiplayer support. (Client and Server included)
The current version is pretty GPU heavy, so this will work best with a G4 or G5 with a higher end card.
http://fox.furcode.co/macOS/PPCCollection/games/xonotic-0.8.2-ppc-darwin.zip
SHA1=50d05c030b9f1548d8e70c148df0dff569b4e6e5
Teeworlds - 0.6.4
https://www.teeworlds.com/
2D multiplayer side-scrolling shooting game based around cartoon physics. (Client and Server included)
Actually works quite nicely on even slower machines, and is buttery smooth on a Ti PowerBook G4!
http://fox.furcode.co/macOS/PPCCollection/games/teeworlds-0.6.4-ppc-darwin.zip
SHA1=dbfaeb54efb96f62c80ee3783e03b4039f61f006
Colossal Cave Adventure - 2.5
https://gitlab.com/esr/open-adventure
Fan of the original text-based adventure game? This is for you!
This was already released as part of another thread, but it may as well be thrown in here.
http://fox.furcode.co/macOS/PPCCollection/games/openadventure-2.5-ppc-darwin.zip
SHA1=ae10f0b12df16e03b3e1464fbef2dedf12184e69
This is a project I'm actively working on, so there are more games to come (and posted to this thread over time)!