MS DOS game from my childhood. You can play it in the browser.

Hercules is aiming to achieve immortality by completing the task the Gods have set him. His task is presented as a platform adventure set in ancient Greece, featuring a variety of enemies as you play it through.

Celeste is also solid because it is infuriatingly hard, even just within its first level. This might be just because I am bad at platformers, but dying 40 times in a row because of one just out of reach ledge had me almost launching my controller at my wall.