Collectathons are about the relationship between space and completeness. Every level is a location to be fully understood, and full understanding means finding every hidden star, every coin cluster, every secret nook the level designer tucked away. Players who engage fully with a collectathon level know that space better than almost any other genre teaches.

Build the collectathon you want. Describe your hub world, your level themes, your collectible types. Summer Engine helps you build the 3D platformer controller, the collectible tracking system, and the hub world unlock structure. You focus on designing the levels that reward players who look everywhere, and the secrets that make completionists feel clever for finding them.

The collectathon's core promise is that the world is worth exploring completely. Every level should feel worth 100 percenting. That means every hidden item has a reason to exist: a clever placement, a platforming challenge, a view that rewards reaching it. Design each hidden item as if it is the thing a first-time player will discover last and feel the most satisfaction about.

• Solo devs who grew up on Banjo-Kazooie or Super Mario 64 and want to build their own take on the genre.
• Teams building a family-friendly platformer where the primary game loop is exploration and discovery rather than combat.
• Designers with a specific world concept and character who want the collectathon format to showcase that world's variety.
• Anyone who wants to build a game where completionism is a feature and 100% is a badge of honor.

• Single World Demo

  Build one fully realized world with all collectible types present, secrets at every difficulty level, and a satisfying 100% state. The deepest possible demonstration of one level.

• Hub World Structure

  Build a hub world with 3 accessible worlds. Collecting enough items in each world unlocks the next. The classic structure that gives collectathons their progression backbone.

• Speedrunnable Collectathon

  Build a collectathon with movement tech that rewards skilled players: precise jumps, movement ability combinations, and a routing system that creates interesting speedrun categories.