Wiki's not that out of date, still gets edits. From what I saw in variables it's possible to end up in a state where artifacts stop spawning; each artifact appears to have its own portal variable, and if they all reach a certain value (3?) it can stop spawning artifact portals, it seems. Most likely to happen in unlimited run games (also I think that ending batch of cheevos are locked in unlimited, by the way).
If you're that desperate to reach the Alternate ending in your current run, try this:
1. Go to
You must be registered to see the links
2. Go to your Phereon folder and navigate through PortalsofPhereon_Data -> saveData
3. Drag or upload your save file to the site
4. Use the bar to search for eventPortals (you need a special portal open, can be unstable or essence)
5. go to eventPortals[0] > specialPortal > value__ and set the value to 9
6. Save the file into saveData
7. That portal
should now be an Artifact portal, for Restoration Orb
From there, follow the wiki instructions.