Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics. Defend Earth's remaining colonies using an arsenal of deadly weapons to torch, slice, throw, and impale swarms of alien invaders.
Players rave about the ability to freely place towers anywhere on the map, allowing them to construct intricate mazes and paths to funnel enemy units. Unlike traditional tower defense games with fixed tower locations, this mechanic gives players a high degree of flexibility in shaping the battlefield to their advantage, a core aspect that sets the game apart.
The game offers a wide variety of defensive towers, each with unique strengths and weaknesses. Players can choose from shotgun towers, missile launchers, laser beams, flamethrowers, and more, experimenting with different tower combinations to handle the increasingly challenging enemy waves. Environmental hazards like lava and ice further expand the tactical options available to players.
While tower defense is the primary focus, the game also incorporates real-time strategy (RTS) elements. Players can construct and control mobile ground units, such as tanks and mechs, to supplement their defensive emplacements. These units can push out to engage enemies or provide supporting fire. Additionally, players can call in powerful air, missile, and orbital strikes to decimate large groups of foes.
As players progress through the campaign, they unlock new towers, traps, units, and special abilities to add to their arsenal. This progression system allows for incremental strengthening of defenses and strategies, creating a sense of growth and mastery over the course of the game. Furthermore, persistent perks and upgrades carry over between missions, further empowering players' customized playstyles.
One of the standout features is the cooperative multiplayer mode, where two players can team up to defend the colonies together. This mode encourages effective division of labor, with one player focusing on tower placement and maze building while the other handles unit production and special abilities. The co-op experience incentivizes players to coordinate their efforts and synergize their strategies for greater success.