City Siege 4. Alien Siege

This is the fourth installment of the City Siege franchise, and the first to be set on another planet. Arm yourself with advanced units and laser guns, and take on the evil plants from this alien world. These plants have abducted valuable human captives that you must rescue. Engage in combat and eliminate the threats to secure the necessary resources.

Use the mouse to navigate the menus and manage your army, including purchasing new troops. In-game controls include: clicking the Drop Ship to deploy your troops, using the mouse to aim, shoot, and select troops, using WASD or arrow keys to move troops around the level, grouping your troops using the 'Grouping' button, pressing [G] to toggle Grouping/Force Fire modes, pressing [T] to teleport your grouped troops to the selected troop's positions, and pressing [ ] or [-] to quickly switch between your troops.