Games like America Against Ants
Games like America Against Ants include Bloons TD 6, Plants vs. Zombies GOTY Edition, Thronefall, Kingdom Rush 5: Alliance TD, and Kingdom Rush - Tower Defense. We matched them by the tags players give America Against Ants on Steam (Strategy, Story Rich, Tower Defense, Action RTS, and Real Time Tactics): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Plants vs. Zombies GOTY Edition
Shared: Strategy · Tower Defense · 2D

Thronefall
Shared: Strategy · Tower Defense · Action RTS

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · 2D

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · 2D

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Real Time Tactics · Isometric

Sudden Strike 4
Shared: Strategy · Real Time Tactics · Action RTS

Company of Heroes 3
Shared: Strategy · Action RTS · Real Time Tactics

Northend Tower Defense
Shared: Strategy · Tower Defense · Action RTS

Hearts of Iron IV
Shared: Strategy · World War II · Alternate History

Kingdom Rush 6: Genesis TD
Shared: Strategy · Tower Defense · 2D

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · 2D

Minimalist Tower Defense
Shared: Strategy · Tower Defense · Real Time Tactics

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · Tower Defense · 2D

Partisans 1941
Shared: Strategy · Real Time Tactics · World War II

Desperados III
Shared: Strategy · Real Time Tactics · Isometric

Call to Arms - Gates of Hell: Ostfront
Shared: Strategy · Real Time Tactics · World War II

Library Of Ruina
Shared: Story Rich · Strategy · Indie

Creeper World 3: Arc Eternal
Shared: Strategy · Tower Defense · Indie

RimWorld
Shared: Strategy · Story Rich · 2D

HoloParade
Shared: Strategy · Tower Defense · Real Time Tactics

Kingdom Rush Vengeance - Tower Defense
Shared: Strategy · Tower Defense · 2D

Creeper World 4
Shared: Tower Defense · Real Time Tactics · Strategy

DG2: Defense Grid 2
Shared: Strategy · Tower Defense · Real Time Tactics