How to Get Gems in Tower Defense Simulator
Updated for v2.4.0 (Story Mode)
This guide to how to get gems in Tower Defense Simulator lists every method that actually pays out real Gems, sourced from the Tower Defense Simulator Fandom wiki (checked August 2, 2026): Hardcore Mode, Polluted Wasteland II, Frost Mode, the Hidden Wave secret, and the Gem Shop. Quick answer: Hardcore Mode pays the most per run (400 Gems) if you're Level 50+, and the Hidden Wave secret is the best option if you aren't.
All Ways to Earn Gems
The table below covers everything we could verify about how to get gems in Tower Defense Simulator as of v2.4.0. Codes are deliberately left off this table — see the "Free Gems from Codes" section below for why.
| Method | Level Requirement | Gem Reward | Notes |
|---|---|---|---|
| Hardcore Mode | Level 50 | 400 Gems | 45 waves, 40-minute time limit. Highest single-run Gem payout in the game. |
| Polluted Wasteland II | Level 50 | 125 Gems | One-time Gem reward for completing the map. |
| Frost Mode | Level 60 | 45 Gems | Seasonal/event mode; reward is per completion. |
| Hidden Wave secret | No level requirement | 50–150 Gems (+100 bonus on first triumph) | Reward scales with difficulty; repeatable after the first clear. |
| Gem Shop | No level requirement | Varies by Robux spent | Direct purchase — the only method that costs real money instead of playtime. |
Fastest Gem Farming Methods
If you're already Level 50 or higher, Hardcore Mode is the fastest answer to how to get gems in Tower Defense Simulator: 400 Gems for one clear beats every other method on this list, though you need a strong loadout to clear all 45 waves inside the 40-minute limit — see our best loadout guide for a Hardcore-ready setup. Polluted Wasteland II and Frost Mode both pay a smaller one-time reward (125 and 45 Gems respectively) but are easier to clear solo, making them a reasonable stepping stone before you're geared for Hardcore Mode.
If you're under Level 50, the Hidden Wave secret is the best option available to you: it has no level requirement, pays 50-150 Gems depending on the difficulty you trigger it on, and grants a one-time 100-Gem bonus the first time you complete it. Because it's repeatable, it remains a viable Gem source even after you've unlocked Hardcore Mode.
What to Spend Gems On
There are only two Gem-only towers in Tower Defense Simulator, and both are rated S tier on our tier list: Accelerator costs 2,500 Gems and requires Level 50, while Engineer costs 4,500 Gems at the same level. If you're saving up from Hardcore Mode runs at 400 Gems each, that's roughly six clears for Accelerator and eleven for Engineer — a realistic target once you've built a Hardcore-viable loadout. Spend Gems on one of these two towers before spending any on cosmetic skins, since both towers outperform every free or Coins-only alternative at their respective price point.
Free Gems from Codes
As of August 2, 2026, the two active Tower Defense Simulator codes — 2MILLION and 1MILCOMMUNITY — both grant free tower skins, not Gems or Coins. If you're searching how to get gems in Tower Defense Simulator hoping for a shortcut, codes are not a reliable one right now. That said, codes have occasionally included Coin or Gem rewards in past events, so it's worth checking our codes page periodically rather than assuming codes never pay currency.
Do Gem Rewards Change With Updates?
Yes — every number in this guide to how to get gems in Tower Defense Simulator is tied to the current v2.4.0 (Story Mode) patch, and Gem rewards for modes like Hardcore Mode or Frost Mode have changed in past balance updates. If a future patch adjusts a reward listed here, we re-verify it against the Tower Defense Simulator Fandom wiki and update the table above rather than leaving outdated numbers live, so bookmark this page instead of copying the numbers elsewhere.
FAQ
What is the fastest way to get Gems in Tower Defense Simulator?
For players Level 50 and above, Hardcore Mode pays the most Gems per run at 400 Gems for a full 45-wave clear inside the 40-minute limit. For players under Level 50, the Hidden Wave secret is the best option since it has no level requirement and pays 50-150 Gems depending on difficulty, plus a 100-Gem bonus the first time you complete it.
Do Tower Defense Simulator codes give free Gems?
Not currently. As of August 2, 2026, the two active codes (2MILLION and 1MILCOMMUNITY) both grant free tower skins, not Gems or Coins. Codes have occasionally included currency rewards in the past, so it is still worth checking our regularly updated codes page.
Can I get Gems without spending Robux?
Yes. Hardcore Mode, Polluted Wasteland II, Frost Mode, and the Hidden Wave secret all pay Gems just for playing — the Gem Shop is the only method in this guide that requires real money.
What can I spend Gems on?
Gems are the currency required to unlock Gem-only towers such as Accelerator (2,500 Gems) and Engineer (4,500 Gems), both rated S tier on our tier list and worth saving Gems for before spending them on cosmetics.