Pet Rift!

Pet Rift is a free-to-play pet collection simulator on Roblox by Rift Studio! that positions itself as an accessible alternative to mainstream pet sims by letting players unlock most Robux-gated content using Emeralds, a free currency from daily and weekly quests. Launched in November 2022 and updated multiple times per week, it has reached over 15 million visits with a 93.3% approval rating.

The core loop involves equipping pets that auto-farm Gold, spending Gold on eggs, and evolving pets through five rarity tiers:

• 💎 Normal - base form from egg hatching
• 💎 Gold - first evolution tier with improved stats
• 💎 Diamond - mid-tier evolution with strong gold generation
• 💎 Divine - high-tier evolution for dedicated collectors
• 💎 Ruby - top-tier evolution with the highest stat multipliers

Beyond hatching, Pet Rift layers in fishing for rare catches, boss fights that reward XP and drops, and a Trading Plaza hub for player-to-player exchanges. Pets can also have Traits - rare special attributes granting unique bonuses that are highly valued in trading. The Plaza hub features meteorite events, prize wheels, and rotating rewards. Offline hatching lets eggs process for up to 8 hours without being logged in, making daily progress effortless.

Five themed worlds - Death, Hell, Ocean, Fantasy, and Cyber - each offer unique egg pools and higher-tier content as progression advances. The game's F2P model is the genuine differentiator: Diamonds (the premium currency) are earnable through quests and events, and Emeralds from quests can purchase most gamepasses directly, removing the Robux barrier for patient players. For a similar pet sim with heavy F2P emphasis, Bubble Gum Simulator Infinity uses a comparable free-currency system.