Pixel Puzzle Collection

Pixel Puzzle Collection is nonogram video game released by Konami Digital Entertainment for mobile devices on October 9, 2018. It features picture puzzles from several classic Konami franchises. A follow-up to the game focusing on the Power Pros series of games, called Power Pro Puzzle, was released on August 26, 2021 in Japan.

Overview
There are four slots in the main menu, each loading a random puzzle in a gacha manner, where the difficulty of the puzzle (shown by a number of stars) increases its rarity. Initially, only one slot is available and the others are unlocked by completing %2, %4 and %8 of the game (solving each puzzle equals %0.2). Once a puzzle is cleared, it'll be withdrawn from the gacha roulette and can be replayed anytime by selecting it on the gallery. The fourth slot is always a "boss" puzzle, which is a 15×15 piece of a 16-piece big picture, Other slots may contain normal or "midboss" puzzles, with the latter being a 15×15 piece of a 4-piece big picture. Once a boss puzzle is solved, there is a 3-hour time limit for choosing another boss puzzle. The puzzles are divided in 10 categories: Action, Shooting, Thinking, Sports, Variety, Gradius, Parodius, Bomberman, School Girls and Castlevania. Once the game is %100 completed, the harder Expert Mode will be unlocked which features the same puzzles again (plus a few extra puzzles) but with the X-marking option being removed. Once this mode is also cleared (%200 completion), the game is considered fully cleared and the gacha will be reset and every puzzle will return to it, shown by the phrase "FREE PLAY" written on all slots.