Great Filter

"Great Filter" is a 2D, top-down view, strategy game with original mechanics. The game consists of 46 levels, each taking approximately 30-60 seconds to clear.

Gameplay

The goal is to get keys on the left road within the time limit. This requires four steps:

Step 1: Mine Operations Players operate two characters with different abilities: the white character moves quickly but works slowly, the black character moves slowly but works quickly. Only one character can move at a time, but the other can continue working. Mines scattered across the level show work duration as numbers. Each mine produces one diamond once, then disappears.

Step 2: Diamond Collection When a character finishes working on a mine, it collects a diamond matching the mine's color.

Step 3: Brick Generation Characters send diamonds to the "little universe" to generate bricks on the left road. Red, green, or purple diamonds create 1x2 vertical bricks; yellow or blue create 2x1 horizontal bricks. Bricks are placed in columns based on color: red in column 1, green in column 2, purple in column 3, yellow in columns 1-2, blue in columns 2-3. Existing bricks support later-generated bricks from below.

Step 4: Level Completion The level completes when any brick overlaps a key. Some levels contain stars that add 5 seconds to the time limit when overlapped, and black holes that destroy bricks on contact.

Strategy