Grebe

Grebe gathers several daily games around one idea: the tree of life, which connects every living thing through shared ancestry. Each game is numbered, new every day and the same for every player. It was made as a personal project by a player with an interest in evolutionary biology, and it runs in the browser on a phone or a desktop.

Lineage, inspired by Metazooa, hides an organism. Every guess lands on a drawn tree at the clade it shares with the answer, so each miss narrows down where the target sits; you can guess a whole group such as snakes or beetles to scout, take a hint that reveals the next branch, or give up. Kinship, inspired by Connections, gives you sixteen species with photos to sort into four hidden clades of four, with four wrong guesses allowed. Branches is Grebe's own: drag species from a tray onto a skeleton of named clades, using the worked examples already placed, then submit to lock in the right ones. Mosaic, the newest, shows an animal photo cut into shuffled tiles, and every wrong guess puts a little more of it back together while a table shows which traits your guess shares with the answer.

The days get harder through the week: Monday's boards are broad and forgiving, and later ones pick look-alike groups that reward knowing your clades. The species and tree come from open sources (Wikipedia and Wikidata for names, the Open Tree of Life for the tree, iNaturalist for photos), and the data set is updated now and then.

There is a leaderboard, stats, a discussion under each day's puzzle once you have finished it, and an optional account that only needs a name and a password. The site says it has no ads, no analytics and no third-party trackers. It suits naturalists, biology students and Metazooa players who want more than one tree-of-life puzzle a day.