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Fortify

Fortify

Fortify is a real-time strategy game with a tower defense twist. Defend your castle from attacking monsters and siege weapons by using ranged and melee defenders, catapults, cannons, oil fields and more. You start at the iron age, advancing to the medieval age, and later, the imperial age.

Released Apr 8, 2016 Developer Holgersson Entertainment Platforms Windows StrategyIndieActionRTSTower Defense
View on Steam ↗ $4.99 (US · as of 2026-09-28)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28.

74.5%positive98 reviews
Recommended · 51 found this helpful

“Fortify is a fun tower defense game, in a more traditional sense in that you have to defend your medieval style castle. Hire ranged and melee troops, collect resources by manning the outposts such as the lumbermill or quarry, and upgrade your castle and build traps. The single…”

— a player, Steam review · 2 hrs played
Recommended · 35 found this helpful

“This game is good. Just a simple Tower-Defense/RTS hybrid in the same vein as some zombie survival flash games you might've seen on Armor Games about a decade ago. Like those games, this one has a very addicting nature and you'll find yourself sinking a good number of hours into…”

— a player, Steam review · 3 hrs played
Not recommended · 17 found this helpful

“Wow!! What a botched job!! Like many of you, I've seen many bad games here on Steam! . . . But this one has to be the worst!! Everything is so poorly coded that you can't even fix the resolution to get full screen. Unit placement is so inaccurate that you can't even finish the…”

— a player, Steam review · 0 hrs played
Read more reviews ↗

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-28.

27achievements
17.5%median completion
0.8%rarest: Who's great? You are!
79.3% of players 59.2% of players 52.6% of players 49.1% of players 48.0% of players 40.4% of players 37.3% of players 30.3% of players 30.1% of players 29.0% of players 28.2% of players 24.3% of players 19.3% of players 17.5% of players 8.9% of players 7.3% of players 3.9% of players 3.8% of players 3.1% of players 2.5% of players 2.0% of players 1.7% of players 1.5% of players 1.1% of players 1.1% of players 1.1% of players 0.8% of players 79.3% 0% most earned rarest
Almost everyone has
79.3%Early Lumbermill — Construct a lumbermill early in the game
59.2%The two two towers — Construct all four towers
52.6%A new Age — Upgrade a unit to the next tier
Rarest badges of honor
0.8%Who's great? You are! — Win 30 multiplayer games!
1.1%Mission Impossible (West) — Finish West mission on Impossible
1.1%Mission Impossible — Finish North mission on Impossible

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Apr 11, 2017
Patch Notes, Version 1.1.1

Hi, Quick fix to the shadow options which unfortunately slipped past my testing. v. 1.1.1 - Changing shadow quality works again. - Changed a minor thing in the outpost build sites to hopefully fix ano

Apr 11, 2017
Patch Notes, Version 1.1.1

Hi, Quick fix to the shadow options which unfortunately slipped past my testing. v. 1.1.1 - Changing shadow quality works again. - Changed a minor thing in the outpost build sites to hopefully fix ano

Mar 29, 2017
Update 1.1! Resolution and UI update

Hi everyone! tl:dr Full patch notes below! Since the successful launch last year I released a number of quick quality of life patches. After that I felt the game was in a good state and left it for a

Mar 29, 2017
Update 1.1! Resolution and UI update

Hi everyone! tl:dr Full patch notes below! Since the successful launch last year I released a number of quick quality of life patches. After that I felt the game was in a good state and left it for a

Apr 16, 2016
Patch 1.0.6

Quick update Summary Outpost Health Bars always visible. Game Speed setting removed from multiplayer where it should never have been. /Jonas Holgersson Holgersson Entertainment

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-28.

GenresAction, Indie, Strategy
Player tagsStrategy · Indie · Action · RTS · Tower Defense (Steam store community voting)
FeaturesSingle-player · Multi-player · Steam Achievements · Steam Cloud · Stats · Steam Leaderboards · Family Sharing
LanguagesEnglish * *
Achievements27
Minimum system requirements (PC)

Minimum: OS: Vista, 7, 8, 10 Processor: 2GHz Memory: 2 GB RAM Graphics: 1GB of dedicated video memory DirectX: Version 9.0c Storage: 300 MB available space Additional Notes: Mouse, Keyboard