Old School Runescape is a game with a variety of pets that players can obtain with OSRS GP. In this guide, we'll be ranking pets in OSRS, but keep in mind that this list is subjective and based on personal preferences. Pets with multiple color options or minor differences won't be included, but if they have significant differences, we'll include them in different tiers. 

• Tier D - Abyssal Orphan, Abyssal Protector
• Tier C - Mole, Beaver
• Tier B - Akka
• Tier A - Bloodhound, Callisto
• Tier S - Baba, Golden Chin

↖Tier D:

• The Abyssal Orphan is not a popular pet due to its ugly appearance, as it looks like a recolored abyssal demon. Its appearance doesn't resemble the Abyssal Sire as many players would like, which places it in the bottom tier.
• The Abyssal Protector is not very popular either, but it has grown on some players over time. It has a unique design but isn't very appealing to many players.

↖Tier C:

• Mole and its variants are cute pets that resemble pancakes, but they aren't very appealing to most players. They have a nice design, but there are better options out there.
• Beaver is not a popular pet due to its plain appearance and outdated graphics. It's just a beaver.

↖Tier B:

Akka, a Toa pet, has a nice design, making it better than Zebic but not at the top of the Toa tier.

↖Tier A:

• Bloodhound is a dog with a hat, and it's one of the best pets in the game due to its cool design. It's quite large and may be a bit awkward, but it's still an excellent pet to have.
• Callisto is another popular pet among players due to its appearance. It's a dog and has been a fan favorite for a long time. It ranks high on the list and is one of the coolest pets in the game.

↖Tier S:

• Baba is a popular pet among players due to its cool design. It is considered one of the coolest pets in the game and is often referred to as a monkey.
• Golden Chin is one of the few pets that players have taken around with them due to its small size. Players can also roll it for a 1 in 10,000 chance of turning it into gold, which is pretty cool.

There you have it, the complete OSRS pet list. Keep in mind that these are just personal opinions, and your favorite pet may not be on this list. Nevertheless, pets are a great addition to the game and are a fun way to show off your achievements.