Obby: Dig to the center of the Earth

Obby: Dig to the Center of the Earth is a free online idle drilling game where you grab your drill and smash straight down through layers of rock, lava, and deep-earth materials to reach the planet's core. Each layer resists more than the last, so you constantly need to upgrade your gear just to keep moving. The core loop is simple but genuinely addictive – break blocks, collect currency, go deeper, repeat.

What keeps players coming back is the upgrade system combined with the pet-hatching mechanic. Pets aren't just cosmetic – they give real loot bonuses and speed up your drilling rate, which actually matters when tougher layers start slowing you down. Prioritize drill upgrades early, then invest in pets once you hit the first major resistance wall around mid-depth. The leaderboard adds a competitive edge, making every run feel like it counts. Unlocking new tools as you descend gives you constant short-term goals to chase.

If you enjoy Roblox-style obby games, Minecraft digging mechanics, clicker RPGs, or idle progression games with a cartoon look, this one checks a lot of boxes. It works great as a casual browser game you can pick up between sessions. Fans of block-breaking games, underground exploration games, and free idle clicker games online will find plenty to grind here. No download, no install – just pick a direction and start drilling.