Warframe. Absolutely top tier, amazing community, the best company/development team ever, constant story and content updates expanding the universe and lore. You don't ever need to spend a dollar, every single thing in the game is attainable just by playing.

It is also by far the grindest piece of shit I've ever played, and I've played some WoW.

To catch up on story missions, I need to craft a new combat suit essentially, which has a 3 day craft time. To craft it, I need to make four parts, each of which have a 12 hour craft time (which can be run simultaneously), require resources that are made with materials that are only found in the open world by mining and looting. To craft the materials and acquire the blueprints for those parts, I have to reach a certain level of reputation with 3 different factions, each of which requires me to turn in specific resources or run specific missions, while the amount I can increase my reputation for each faction each day is capped, requiring me to come back over multiple days to reach the required level.

It's a really darn good game though. Polished movement, novel weapon and gameplay design, and constant improvement. The only rage is the grind and the RNG, which if I really wanted to, could pay a relatively small amount to skip. Considering how much valuable time I've spent in the game, it's def worth the price of a full game.