We love free online space games such as Explorer as they not only require a degree of skill to play them, but you get to go on a mission of discovery in a virtual alien world. In this free flash space game, you take the role of the Explorer probe. Set in the year 2062, a deep space probe identified an underground alien structure but could report no life forms. The Explorer probe was launched to go into the underground space structure and identify whether any alien artefacts had been left behind. To play this space game use your mouse to pull the probe in the direction you wish to travel, but beware of the many pitfalls that await you.... After you play Explorer, why not check out and play our other free online space games?