Two more new games come to Antstream this week. Shoot down alien ships in Magalopolis SOS (MSX) and master the slopes in Snowboard Championship (Arcade).

Megalopolis SOS was originally released for the MSX system way back in 1983. The game is a fixed screen shooter in which the player must defend the major cities of Earth against alien attack. Similar to the original Space Invaders, Megalopolis SOS will have the player moving their target cursor to take down alien ships attacking from the top of the screen.

Alongside a usual projectile missile, the player can also fire what the game calls “floaters” which are a mine of sorts that will explode on contact with an alien ship. Along the bottom of the screen are representations of major Earth cities that will fall to ruin if they take enough damage. Save these major cities, such as London, New York City and more, by removing the alien threat.

Snowboard Championship is a Gaelco arcade game from 1997. Snowboard Championship replicates the thrill of racing down a snow-covered mountain on a snowboard, with the player having to react to on-screen prompts showing upcoming turns. It is all about the time on the various courses available in the game, picking the perfect line and avoiding obstacles to maintain high speed.

There are three different snowboarders to choose from, representing Japan, US and Europe, and two different modes. Strap on your board, adjust those goggles and show the mountain who’s boss.

This week’s challenge is Most Valuable Figurine in BioMechanical Toy (Arcade), for players who want to prove just how good they are.

We’ll be back next week with more games to play anytime, anywhere.