Agar.io is a free online game where you control a cell, eat pellets and smaller players, and avoid bigger ones. You split, eject mass and use viruses to climb the leaderboard.
Skribbl.io is a free browser drawing and guessing game. In a private room you can paste your own comma-separated custom words, and this page gives themed lists to copy.
Skribbl.io is a free browser drawing and guessing game. One player sketches a word while the others race to guess it in chat, and you can set up a free private lobby with custom words.
