Udongein X

Udongein X is a platforming game in which Reisen sets out to rescue a group of Moon Rabbits who have crash-landed in Gensokyo. She must save each of her former comrades and take on the Lunarians behind the trouble.

Boss fights

The game has 14 boss fights, each with its own gimmick and mechanics. You need to dodge bullets and adapt your strategy to each boss.

Upgrade Reisen

You earn Power Up items from stages and bosses and can spend them to strengthen Reisen. Upgrades include increasing her maximum health and gaining the ability to erase entire screens of bullets. You can also ignore the upgrade system for an added challenge.

Difficulty settings

The game has three difficulty settings. Easy reduces the number of bullets on screen for a more traditional platforming experience, while Lunatic offers a test of skill and patience. Lunatic unlocks after you beat the game once. Changing the difficulty resets your current playthrough.

Survival mode

Survival is a Boss Rush mode where you choose perks between fights. The mode gets progressively harder, and reaching a large enough win streak may unlock something.