Each level of Anomaly Defenders sees enemies moving down a set path to take out escape launchpads somewhere on the screen. Players can build turrets and other defensive items on specific build spots along this path, and are encouraged to start this building while the game is paused to keep on top of things. Players can only build as many items as they can afford, using in-game currency. This recharges as players defeat enemies, or players can sell units for an instant boost.
Defenses will attack incoming human troops automatically, and players can repair these towers using energy dropped by fallen enemies. Users can also spend currency to upgrade towers, once they’ve been placed.A special unit type, the harvester, can be placed on top of currency mines, providing players with a limited stream of currency as they play. Enemies will divert from their route to attack these harvesters, giving players additional opportunities to ambush them before they reach the launchpad.
Once players have a handle on the situation, they can speed up the game to make progress faster. Each level has multiple waves of enemies, while some have multiple entry points as well. Once players successfully complete each mission, they earn rewards in the form of technology points (TP), which are spent to research new alien technologies. It’s worth noting that players can choose from three difficulty levels before playing each mission, which impacts the number of TP earned at the end.The game’s research tree contains multiple branches for players to explore and activate. Users can upgrade different areas, depending on their play style. For instance, one might want to upgrade their towers’ attack strengths and defenses. Or, gamers could focus on unlocking and upgrading support functions like increasing the probability of dealing a critical hit during battle. Users can unlock better repairing capabilities, an increased energy storage capacity, stronger harvesters and so on.