Don't just buy new guns; expand basic features of existing ones. You can also disassemble old weapons to recoup money and auxiliary supplies.
When placing two identical units together, give one a slightly lower-tier weapon. This causes them to fire at different cadences and often at different enemies, reducing wasted DPS and retargeting time. alien-shooter-td-darksiders
Used primarily to push enemies back. Always place them facing the enemy directly (not from the side) to maximize the knockback effect. Don't just buy new guns; expand basic features
The game's auto-targeting can be inefficient. You can manually set a target for your troops to focus on high-priority threats like fast or flying enemies. Don't just buy new guns