Randomized levels and the chance of upgrading your units keep tempting us back for one more round. As the Blitzkrieg, you might use your Hook Mech to move enemies into a line, then strike with your Lightning Mech to send a pulse of electricity through them all, for example. Your three units have their own skills, and you must work out how to apply them to the situation at hand. The Blitzkrieg are lightning specialists, the Frozen Titans use ice, the Steel Judoka use raw physical strength. You take control of one of eight mech squads, which you unlock sequentially, each with its own specialty. If you are still nostalgic for those retro games from your childhood then head to the Google archives and insert a virtual coin. PAC-MAN was the first Google Doodle game and it was a little demo of what a browser can do. It’s your job to slot those puzzle pieces into place, and decide how you can wipe out as many of them as possible in one turn. This rendition of the classic arcade game started it all.

Your alien enemies - usually giant insects - always telegraph their next move, whether that’s moving one square, attacking a skyscraper, or spitting bile in your direction. In the game, you will make a new character in a medieval world, interacting with hundreds of other players at the same time. Okay, it’s not actually chess, but Into the Breach’s rules feel equally as simple and elegant. One of the oldest browser games in our list, Runescape is one of the best MMORPGs, released around the year 2000 and is still active to this date. It’s chess, but with rocket launchers and mechs instead of knights and bishops.

Pass time games