Arknights: Endfield, as an infrastructure-type game in the二次元genre, allows players to build defensive towers during the exploration of wastelands. The primary function of these towers is to protect the base and provide additional support capabilities. Many new players are not very clear about what defensive towers are available in Arknights: Endfield? Here, I will provide information on the defensive types to help players comprehensively understand the defense system.
The number of defenses in the game is not many, but the types of attacks they can provide are quite varied, capable of dealing with most monsters. First, there's the Liquid Oxygen Tower, which uses a freezing attack, summoning ice crystals to attack enemy monsters. When it hits a group of monsters, it explodes and slows them down. This tower leans more towards support, used for slowing down the enemy. It's quite useful to build in the early stages.

Next is the Medical Tower, whose main function is to heal surrounding operators. Its supportive value is quite significant, especially when the team has no healing members. It provides room for error for the team and frees up a slot for placing a damage-dealing character, thus significantly increasing the overall team's output.
Then there's the Expanded Gun Tower, which primarily attacks using light waves. It can rapidly fire a large number of light waves at nearby enemies, though its range is not very far, only able to attack nearby monsters. It can be placed as the main offensive tower to alleviate the lack of firepower on our side.

Following that is the Surge Tower, which releases lightning attacks. This lightning can connect to nearby enemies, causing decent area-of-effect lightning damage. However, its attack frequency is not high, requiring a cooldown period before it can deal damage again. A few of these towers are generally enough. Lastly, there's the High-Explosive Grenade Tower, which attacks by launching grenades, causing devastating explosive impacts around it. Its attack speed is moderate, making it very suitable for eliminating larger groups of monsters.

Finally, there's the High-Frequency Ray Tower, which releases a super-large laser, capable of causing devastating damage to enemies in a straight line. The trade-off is that it has a very slow cooldown, allowing it to be used only a few times.

Above is all the information I provided on what defensive towers are available in Arknights: Endfield. There are quite a variety of defensive towers in the game, basically covering both attack and support types. Players can decide on the corresponding defensive towers based on their own lineup.