I must admit my current addiction now online is Bots by Acclaim.

As with the website description “Play Bots – the free MMORPG from Acclaim. Build your bots, then battle through fifty levels.”.

Via the website about Bots

The balance of cyberspace is in danger! Last night, there was a disruption in the digital world. Corrupted sectors are turning every day BOTS into evil viruses. You must join forces with friends old and new to defeat ever-spawning new foes. Buy and trade accessories for endless combinations and begin your quest to save yourself and the digital world.BOTS (Bots of Unlimited Transformation) is a one-of-a-kind multiplayer online action game
that all ages can enjoy.

It’s truly addicting, you’ve been warned!