Growden is a gardening game played in a shared world. You plant seeds, water them, wait for them to grow, and harvest for currency you spend on better seeds and more plots — while other players do the same around you. There is no combat and nothing to lose; the pressure is entirely self-imposed.
It sits in the same corner of the catalogue as the idle games: something to leave in a tab, check on between other things, and gradually build up. The multiplayer is ambient rather than competitive — you see other gardens grow, and that's most of the charm.
Yes — you garden in a shared online world alongside other players, though there is no combat or competition for resources.
No. It runs in the browser with nothing to install; progress is kept in your browser.
Yes — it is a light browser game and a good one to leave in a background tab.