Comparison

Observer for Screeps vs DC34 CTF

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Observer for Screeps

Features
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An unofficial client for the programming MMO RTS game Screeps. Requires a Screeps account and auth token to connect. Does not have features for writing/updating your Screeps codebase. Is primarily for viewing the game and some limited manual interaction. Feature highlights: - View your rooms in a unified room/map view where zooming in on a room shows the full detail and room objects and you can pan over to adjacent rooms to switch to viewing them. Zooming out switches to map detail.  - View room details by tapping the room on the map.  - View object details by tapping an object in a room. - Supports MMO and private servers. - View player profiles - View leaderboards - View console output and submit console commands. - Respawn - View room and map visuals - Flags (create, place, remove, edit) - Construction sites (create, place, remove) - Other manual interactions (destroy owned structure, activate safe mode, destroy own creep, etc) - Power creep management (view, create, upgrade) - See list of active nukes across the shards

About

DC34 CTF

Engage in a challenging capture-the-flag game with diverse puzzles spanning cryptography, physical challenges, and hardware integration. Unlock fourteen channels, solve intricate problems without hints, and compete on a live leaderboard for prizes. The game is locked until the DEF CON 34 convention begins.

Highlights
  • Capture the Flag gameplay
  • 14 diverse puzzle channels
  • Cryptographic and physical challenges
  • Hardware integration puzzles
  • Live in-app leaderboard
  • Unlockable prizes
  • Hidden secrets
Features
Read full description

DC34 CTF is a capture-the-flag game built for DEF CON 34. Fourteen channels are dark. Your job is to light them up. Download before the con. The app locks until the convention opens. When the doors open at LVCC West Hall in Las Vegas on August 7, it unlocks and the game begins. FOURTEEN CHANNELS. ONE FINAL TARGET. Every channel is a different kind of puzzle. Some are cryptographic. Some are physical. Some require hardware your phone didn't know it would be using. No hints. No walkthrough. Figure it out. The challenges span XOR ciphers, steganography, DTMF tone analysis, radio direction finding, Bluetooth beacon hunting, geolocation, reverse image search, physical navigation, NFC, speech recognition, and more. Your phone's full sensor suite is in play — camera, microphone, GPS, accelerometer, compass, Bluetooth, NFC. PRIZES The first three players to complete all fourteen channels and claim the final flag receive physical prizes: gold, silver, and copper coins. Finishers four through thirteen get pins. Your rank is permanent — logged to the live leaderboard the moment you scan the hand. THE LEADERBOARD A live in-app finishers board tracks every player who completes the game, ranked by completion time. Watch it fill up in real time. THERE IS MORE The app has secrets that have nothing to do with the flags. Some people will find them. Most won't. REQUIREMENTS iOS 17 or later. Game Center must be enabled — the app authenticates silently at launch. Several challenges require network access, Bluetooth, NFC, location services, camera, and microphone. Grant permissions as the game asks for them or miss the challenges that need them. The app is locked until August 7, 2026 at 9:00 AM PT. Show up at DEF CON 34, LVCC West Hall, Las Vegas. You can play anywhere, but final flag unlocking prizes is only available in-person.

Screenshots

Observer for Screeps4 screens
DC34 CTF4 screens

Verdict

The call

Observer for Screeps and DC34 CTF are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Observer for Screeps versus DC34 CTF: the parameters behind the verdict, then further details
ParameterObserver for ScreepsDC34 CTF
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequency—Every 3 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size6 MB6 MB
Age rating17+4+
DeveloperJacob KellyJeremy Yablan

In-app purchases

None

Observer for Screeps

No in-app purchases

None

DC34 CTF

No in-app purchases

Questions

Is Observer for Screeps free?
Observer for Screeps is free to download, with no in-app purchases.
Is DC34 CTF free?
DC34 CTF is free to download, with no in-app purchases.
Do Observer for Screeps or DC34 CTF have ads?
Neither Observer for Screeps nor DC34 CTF shows ads.

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