Games like Florentum
Games like Florentum include Shelldiver, Plants vs. Zombies GOTY Edition, Outhold, Nodebuster, and Kingdom Rush - Tower Defense. We matched them by the tags players give Florentum on Steam (Incremental, Tower Defense, PvE, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.

Shelldiver
Shared: Incremental · Arcade · 2D

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

Outhold
Shared: Incremental · Tower Defense · Strategy

Nodebuster
Shared: Incremental · Strategy · Arcade

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

Plants vs. Zombies: Battle for Neighborville™
Shared: Shooter · PvE · Tower Defense

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

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

Zero Stress King: Idle Defense
Shared: Tower Defense · Incremental · Strategy

Draw & Guess
Shared: Funny · PvP · PvE

ShellShock Live
Shared: Strategy · Shooter · 2D

Ninja Kiwi Archive
Shared: Tower Defense · Arcade · Strategy

Sir, We Have an Orc Problem
Shared: Incremental · Tower Defense · PvE

Fistful of Frags
Shared: PvP · PvE · Shooter

Legion TD 2 - Multiplayer Tower Defense
Shared: Tower Defense · PvP · Strategy

A Game About Feeding A Black Hole
Shared: Incremental · Strategy · 2D

Counter-Strike 2
Shared: Shooter · PvP · Action

Squad
Shared: PvP · PvE · Shooter

Cookie Clicker
Shared: Incremental · Casual · 2D

Keep on Mining!
Shared: Incremental · Arcade · Relaxing

Orcs Must Die! 3
Shared: Tower Defense · PvE · Strategy

PUBG: BATTLEGROUNDS
Shared: Shooter · PvP · Strategy

Bills Must Be Paid
Shared: Incremental · Strategy · Arcade

Stick Fight: The Game
Shared: PvP · Funny · 2D