Free demo & player guide
Undine's Deep
No sign-up · no deposit · full screen available
Free slot demo · player guide
Undine's Deep
Undine's Deep game by Endorphina will take you to the deep ocean where charming mermaid Undine all together with other sea creatures dwell. The illusion of the ocean is just perfect, soothing music, slowly moving seagrass, seahorses, and crystal clear water tempting for a dive.
18+ · free play · no account or deposit
Game details checked 1 Oct 2026How we check games
60-second guide
What matters at a glance
Free play
Play Undine's Deep here
Open the game above to check its pace, controls and features. Free play stays on SlotsCollector.
Look for
Features worth trying
- Game features
Wild, Risk Game, Bonus Pop, In-Game Free Spins, Scatter, Multiplier
Game overview
What is Undine's Deep?
Undine's Deep game by Endorphina will take you to the deep ocean where charming mermaid Undine all together with other sea creatures dwell. The illusion of the ocean is just perfect, soothing music, slowly moving seagrass, seahorses, and crystal clear water tempting for a dive. Among the symbols on the reels, you can find the Seastar symbol, Seahorse symbol, Gold fish symbol, Jellyfish symbol, Seashell symbol, and Playcard symbols. The symbol featuring mermaid Undine is Scatter, two Scatters on the paytable trigger pays payout, three or more Scatter symbols trigger Free games. During Free games, all prizes are multiplied by X3. Free games can be won again during the feature. The Gold fish represents Wild, it can substitute all symbols except Scatter and doubles the win when substituting.
How it plays
The features that shape the game
Undine's Deep is listed as a Video Slot from Endorphina.
Game features
Wild, Risk Game, Bonus Pop, In-Game Free Spins, Scatter, Multiplier
Before you play
Does Undine's Deep match what you want?
Judge the format and features first. Theme alone tells you very little about how a game feels.
What this game offers
- Video Slot format from Endorphina
- High volatility
- Game features
What to check first
- This page lists RTP at 96.07%; confirm it in the version you open.
- Casino stake limits and feature settings may differ from the free-play version.
- Free play shows the mechanics, but it cannot predict a future result.
Quick answers
Undine's Deep FAQ
Clear answers based on the game information and demo status available today.
Can I play Undine's Deep for free?
Yes. Select “Play free demo” to open Undine's Deep on this page without an account or deposit.
What type of game is Undine's Deep?
Undine's Deep is listed as a Video Slot from Endorphina. The confirmed features are listed above.
What is the RTP of Undine's Deep?
The RTP shown for Undine's Deep is 96.07%. A casino may offer a different configuration, so confirm the value in the in-game information screen.
Can I play for real money here?
No. SlotsCollector provides game information and free demos only; it does not accept bets or deposits.
Game facts
Undine's Deep numbers and features
These are the details currently confirmed for this game. Check the in-game information before using real money.
Payouts & risk
- RTP
- 96.07%
- Volatility
- High
- Maximum win
- 3,800×
- Bet range
- 0.1 – 90
Reels & wins
- Reel layout
- 5×3
- Paylines
- 10
Bonus features
- Features
- Wild, Risk Game, Bonus Pop, In-Game Free Spins, Scatter, Multiplier
- Bonus buy
- Yes
Release & devices
- Release date
- 1 Jun 2014
- Platforms
- Desktop, Mobile
- Theme
- Underwater World
More to play
More games from Endorphina
Check real-money availability
This game may be available to play for real money at our partner sites. Availability varies by location.
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