[Steam] Spooky's Jump Scare Mansion (2015, 2017)

It's a horror indie game where you have to escape 1000 rooms by avoiding monsters to get out of the house. There's a regular version and an HD version. The regular version is free but requires you to pay for 2 DLCs, while the HD version is paid, with improved graphics, motion, etc., and the DLCs are free. Besides the story mode, there's also an endless mode, which is literally a challenge mode where you have to escape rooms endlessly. Monsters not appearing in the main game show up, and as you progress, up to 5 monsters can appear at once, making the difficulty much harder.