Galactic Café — House Paper

The Galactic Café is a cantina-themed annex of Plypto where captains can step away from the belt for a moment between two raids. It is not a casino, not a betting service, and not a payment product. It is a small set of mini-games inside the same game world, paid for and rewarded entirely in protons.

There are currently four tables open in the cantina: Galactic Roulette, Roll Under (d100), Roll Identical (d6), and Galactic Scratch Cards. Each table is described below with its principle, its win conditions, the fair odds, and the expected return after the house cut.

This document is intentionally not listed in the site footer. It is reached only through the Terms of Use and the Terms of Sale, because its primary purpose is to back the legal disclosures that govern the café — not to advertise the café to anyone passing by.

Every table in the Galactic Café is denominated in protons, the in-game resource you already use to deploy and upgrade infrastructure on your planet. Stakes, payouts, café fees, and history rows are all expressed in whole protons.

Protons obtained at the café are non-withdrawable. Their only purpose is to be reinvested into your planet — building or upgrading energy, economic, offensive, or defensive infrastructure, or being spent on optional in-game items priced in protons (such as Battle Strike Passes). They do not appear in the BTC withdrawal flow, do not count toward the BTC withdrawal threshold described in the Terms of Use, and cannot be exchanged with another player.

In practice this means: you cannot "cash out" from the Galactic Café. Any value created at a café table stays inside the planet economy. The café is therefore best understood as a thematic way to redistribute and reshuffle protons inside the game, not as a way to acquire money.

The Galactic Café charges a 15% café cut on the net winnings of every winning play, on every table where the cut is currently enabled. Net winnings are defined as gross payout − stake: the gain above your original stake. The fee is not applied to losses (a losing spin only loses the stake, with no extra fee).

Rounding. Café fees are rounded to the nearest whole proton at the time of crediting so the activity feed is always self-consistent (stake + delta + fee = gross). For very small wins this can produce a fee of 0 P or 1 P due to rounding, in line with the principle that the fee never eats into the stake itself.

Adjustability. The 15% rate is the current setting at the time of writing this paper. It is configurable by the platform operator and may be adjusted at any time, on a per-table basis, including being temporarily turned off. The effective rate that applies to any given play is the rate recorded on the activity log row for that play; it is the source of truth, not this paragraph.

Principle. A European single-zero roulette wheel with pockets numbered 0–36. The pocket 0 is the house pocket (green); reds and blacks alternate per the standard European layout. The server draws the winning pocket with a cryptographically-secure RNG before the wheel is animated; the visible spin is purely cosmetic.

Stakes. Whole protons only, between 1 P and 100 P per spin (kept conservative for the soft-launch phase).

Bet types and payouts. The fair (pre-fee) gross multiplier shown below is the total amount returned to the player on a win, including the original stake. RTP is computed on a fair European wheel (P(win) × multiplier).

After the café cut. Applying a 15% fee on net winnings keeps the same probabilities and pocket layout, but reduces the credited payout. For an even-money bet (red / black / even / odd / low / high), the post-fee expected return per stake is roughly ≈ 90% (≈ 10% effective house edge). The single-zero edge is 1/37 ≈ 2.70%; the rest is the café cut on the net win.

House tilt.The operator may also configure a separate "win factor" that, when below 1, rerolls some winning fair draws into a losing pocket. The factor that was applied to a given spin is stored on its activity-log row.

Principle. The player picks a target T in [2, 99]. The server draws a value R uniformly in [1, 100] using a CSPRNG. The player wins if R < T.

Win probability. P(win) = (T − 1) / 100. Choosing a higher target raises your probability of winning but lowers the multiplier, and vice-versa.

Fair multiplier. m(T) = 100 / (T − 1). This makes the fair RTP exactly 100% before the café cut: the house edge on this table comes entirely from the 15% fee on net winnings, not from the math itself.

Stakes. Whole protons only, between 1 P and 100 P per roll.

Indicative numbers, computed as P(win)·(m−1)·(1−fee) − P(loss). The fee scales with the multiplier, so high-multiplier picks lose more on average; low-multiplier picks lose less but win small.

Principle. The player picks a face F in [1, 6]. The server rolls a six-sided die uniformly with a CSPRNG. The player wins if the rolled value equals F.

Win probability. P(win) = 1/6 ≈ 16.67% regardless of which face is chosen.

Fair multiplier. ×6, which gives a fair RTP of exactly 100%.

After the café cut. Net winnings on a win equal 5 × stake; the 15% fee deducts 0.75 × stake, leaving a net gain of +4.25 × stake. Expected return per stake is approximately 87.5%, i.e. an effective house edge of ≈ 12.5% from the café cut alone.

Stakes. Same as the other dice tables: whole protons, 1 P to 100 P.

Principle. The player buys a ticket for a flat cost of 10 P. The server picks the prize tier before the ticket is shown, using a CSPRNG; the scratch reveal animation is cosmetic. The outcome and prize are committed in the database before any response is sent to the client.

Prize tiers.Five tiers, including a no-prize "Void" tier. The prize amounts are fixed; what the operator can adjust is the target Return-to-Player rate (RTP), which scales the winning tier probabilities while clamping the Void tier so the probabilities still sum to 1.

RTP. The base RTP of the table (with no operator adjustment and ignoring the café cut) is approximately 29.5%. The operator may raise or lower this within a fixed band (between 5% and 70%) by changing the "target RTP" setting, which uniformly rescales the winning-tier probabilities. The value used for any specific ticket is recorded on its activity-log row.

After the café cut. The 15% fee is applied on the gross prize of each winning tier. With the default target RTP, the effective net RTP after the fee is approximately 25%. As with the other tables, this is best understood as the long-run average across many tickets; an individual ticket can return anywhere from 0 P to a full Pulsar jackpot.

Server-authoritative. Every roll, spin, draw, and prize-tier selection is performed inside a single server-side transaction using Node's crypto.randomInt (CSPRNG). The client never receives a random source it could tamper with; it only animates the result the server has already committed. Balance debits, payouts, café fees, and audit logs are written together so the proton balance can never drift mid-play.

Win factor.An operator-set parameter (between 0 and 1) controls how many of the player's fair winning rolls survive: a value of 1 means classical odds (no tilt), a value of 0.4 means roughly 60% of fair winning rolls are flipped to a losing value, and so on. The win-factor value applied to any spin or roll is recorded on its activity-log row, so players and administrators can audit it after the fact.

Audit trail.Each table writes a per-play log row with the stake, the fair draw, the resolved value, the win factor, the café fee rate and amount, and the post-play balance. The Galactic Café activity feed in the player's account exposes a sub-set of these fields so each play can be inspected after the fact.

• Treat any time at the café as entertainment, not a reliable way to grow a planet's economy.
• Set yourself a comfortable session budget in protons before you sit at a table; stop when you reach it, win or lose.
• Never spend protons whose loss would derail your planet build or change how you feel about the rest of the game.
• Take breaks. If you ever feel pressured to keep playing, close the cantina and come back another day.
• If you have any concern about your relationship with games of chance, please speak with a qualified support service in your country before continuing to play.

A note for new players. Because the café cannot pay out money of any kind, even a sustained losing streak at the café does not produce a financial loss in the strict sense — only a redistribution of in-game resources. That said, protons cost real BTC to acquire upstream (through proton packs), so a careless café session does indirectly translate into time and money that already left your wallet to enter the game. Please play accordingly.

This paper is an explanatory companion to the Plypto Terms of Use and Terms of Sale. In case of any conflict between this document and those terms, the Terms of Use and Terms of Sale prevail.

The probabilities, multipliers, and effective rates quoted here are accurate as of May 5, 2026and are subject to change as the platform evolves; the values stored on each play's activity-log row are the authoritative record of what actually applied to that play.

Plypto is a strategy game. The Galactic Café is part of that game and is not a gambling service, not a real-money game, and not a payment product. If the laws of your country prohibit participation in games of this nature, you must not play at the café.