Algeria visa requirements
The rule for your own passport, from Algeria's official immigration page, with the date it was last checked. The same answer for every guide in Algeria: Algiers.
Visa required in advance€85 or so
Every other passport
Almost every nationality needs a visa arranged in advance, and the application generally requires either a hotel booking through a licensed Algerian agency or an invitation from a resident. This is the single biggest obstacle to visiting, and it is worth starting two months out.
How to get it: Apply at the Algerian consulate for your country with a confirmed itinerary from a licensed local agency. Processing is slow and rejections without explanation are not unusual.
Entry rules change often and depend on your passport, your route and the purpose of the trip. Confirm on the official page before booking.