Defend the subnet.
Deploy the stack.
GeMax TD is a single-player tower defense set in the netrunner grid. Plant defense programs along authored paths, harden them through a tech tree of permanent upgrades, and survive intrusions that get smarter every chapter.
Pre-launch. Add your email on the support page to be notified at release.
Tactical depth without the bloat
Designed as a clean, replayable tower defense. No timers blocking play, no mandatory ads to win.
Authored paths, fixed waves
Designer-built routes you learn over runs. No procedural mush — every mission has a shape worth mastering.
Per-match difficulty
Easy, Normal, Hard, Insane. Pick your slope every run. Chapters ramp on top with a soft cap so late-game stays fair.
Tech-tree meta-progression
Earn shards from runs, spend them on a permanent tech tree. Effects are observable in-match — no invisible buffs.
Deterministic engine
Fixed-timestep simulation with a seeded RNG. Same seed, same run — useful for daily challenges and replays.
Skia rendering
GPU-accelerated 2D with glow shaders and clean vector primitives. Looks sharp on every density.
Plays offline
Single-player and offline-first. Save state lives on your device. No account required to play.
One run, three layers
In a mission
- Tap a build cell to place a defense program
- Upgrade in place — see the stat delta before you spend
- Switch speed (1× / 2× / 3×) on the HUD when waves stabilize
- Pause anytime; the engine clamps real time so background stalls don't punish you
- Lose a life when an intrusion leaks; lose the run when lives hit zero
Between missions
- Convert run shards into permanent tech-tree nodes
- Unlock new towers and tags through chapter milestones
- Replay any cleared mission on a higher difficulty for more shards
- Stats and selections persist across devices via local save (cloud sync planned)
From the grid
In-game captures from the latest build, running on iPhone.
How GeMax TD makes money
Up-front: the base game is free with optional purchases and ads. Below is exactly what you'll see and what you can opt out of.
Free to play, fair to play
- The base game is free. Optional in-app purchases and an optional subscription will be available — details disclosed in-app at the point of purchase.
- Rewarded video ads are opt-in only — you choose when to watch one in exchange for an in-game reward.
- Interstitial ads are shown sparingly between missions, never during active gameplay.
- Nothing for sale grants an unfair advantage; every progression node is reachable through normal play.
Full purchase, subscription, and refund terms live in the Terms of Service and Privacy Policy.
Common questions
Is GeMax TD free?
Yes. The base game is free to download and play. Optional in-app purchases and an optional subscription are available, and rewarded video ads are opt-in.
Does it require an internet connection?
No. Missions, the tech tree, and the save state run fully on-device. A connection is required only to download updates, watch rewarded ads, and verify in-app purchases.
Will my progress sync across devices?
At launch, save data is local. Cloud save is on the roadmap and will be opt-in.
Are purchases pay-to-win?
No. Optional purchases never grant an unfair advantage — every progression node is reachable through normal play.
How do I cancel a subscription?
Manage and cancel from your platform's subscription settings: iOS — Settings → Apple ID → Subscriptions. Android — Play Store → Profile → Payments & subscriptions → Subscriptions. Cancellation stops the next renewal; current period continues until expiry.
What data does the game collect?
Crash logs, anonymous gameplay analytics, and (with consent) advertising identifiers used to serve ads. You can opt out of personalized ads in-app and at the OS level. See the Privacy Policy for the full breakdown.
Is it suitable for kids?
The game is rated for a general audience but is not specifically directed at children under 13. We do not knowingly collect personal data from children. If you believe a child has created an account or made a purchase without consent, contact support@gemax.online.
I found a bug. Where do I report it?
Email support@gemax.online with your device, OS version, and a brief description. See Support for what to include.