Games like Porta-Tower
Games like Porta-Tower include Hades, Megabonk, Skul: The Hero Slayer, Vampire Survivors, and Hades II. We matched them by the tags players give Porta-Tower on Steam (Strategy, Tower Defense, Action, Roguelite, and Roguelike): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Roguelite · Action Roguelike · Action

Megabonk
Shared: Roguelite · Roguelike · Action Roguelike

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Roguelike

Vampire Survivors
Shared: Roguelite · Action Roguelike · Roguelike

Hades II
Shared: Action · Roguelite · Roguelike

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Singleplayer

Rogue Tower
Shared: Strategy · Tower Defense · Roguelike

Thronefall
Shared: Strategy · Tower Defense · Action

Rogue Legacy
Shared: Roguelike · Action · Action Roguelike

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Action

Orcs Must Die!
Shared: Tower Defense · Strategy · Action

Emberward
Shared: Tower Defense · Strategy · Roguelite

The Binding of Isaac
Shared: Roguelike · Action Roguelike · Action

Risk of Rain 2
Shared: Action Roguelike · Roguelike · Roguelite

Necrosmith
Shared: Tower Defense · Strategy · Roguelite

Wall World
Shared: Roguelite · Tower Defense · Strategy

Sephiria
Shared: Roguelite · Action Roguelike · Roguelike

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · Singleplayer

The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Indie

Ravenswatch
Shared: Roguelike · Action · Action Roguelike

Cluckmech Oasis
Shared: Strategy · Tower Defense · Roguelike

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Kingdom Rush Vengeance - Tower Defense
Shared: Strategy · Tower Defense · Singleplayer

Gunfire Reborn
Shared: Roguelite · Roguelike · Action