Games like Miko Sniper
Games like Miko Sniper include Plants vs. Zombies GOTY Edition, Kingdom Rush - Tower Defense, Bloons TD 6, Door Kickers: Action Squad, and Celeste. We matched them by the tags players give Miko Sniper on Steam (2D Platformer, Tower Defense, Shoot 'Em Up, Shooter, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

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

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

Bloons TD 6
Shared: Tower Defense · Strategy · 2D

Door Kickers: Action Squad
Shared: 2D Platformer · Shooter · 2D

Celeste
Shared: 2D Platformer · Female Protagonist · 2D

Cluckmech Oasis
Shared: Tower Defense · Strategy · Cute

Black Market of Bulletphilia ~ 100th Black Market.
Shared: Shoot 'Em Up · Shooter · Female Protagonist

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

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

Ninja Kiwi Archive
Shared: Tower Defense · Strategy · 2D Platformer

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Female Protagonist · 2D

Webbed
Shared: 2D Platformer · Cute · 2D

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Female Protagonist · 2D

Alex Jones: NWO Wars
Shared: 2D Platformer · Shooter · Shoot 'Em Up

Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Shooter · 2D

Let Them Come
Shared: Tower Defense · Shooter · 2D

Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Shoot 'Em Up · Shooter · Female Protagonist

DEVIL BLADE REBOOT
Shared: Shoot 'Em Up · Shooter · 2D Platformer

Bloons TD 5
Shared: Tower Defense · Strategy · 2D

Huntdown
Shared: Shooter · Shoot 'Em Up · 2D

DRAINUS
Shared: Shoot 'Em Up · Shooter · 2D

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

Sonic Origins
Shared: 2D Platformer · Action · 2D

Bit Blaster XL
Shared: Shoot 'Em Up · Shooter · 2D