Smartsoft Gaming

Apollo 77

Slots Video Slots Space Star Moon Medieval Sci fi

Space mission slot pairing standard symbols with bonus objectives

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

98%

return to player

Volatility

—

variance

Max win

250×

top multiplier

Min bet

$0.25

per spin

Reels

grid

Player rating

3.5 ★

18 votes

DEMO Play free, no signup

Smartsoft Gaming

Embed on your site

3.5 / 5

18 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP10/10

RTP 98% → 10.0/10

Volatility8/10imputed

imputed medium (unknown) → 8.0/10

Win Potential4.8/10

x250.00 (250×) → 4.8/10

Features3.5/10

4 features → 3.5/10

Game Mechanics4.3/10

f=4 r=5 → 4.3/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.25–100 (×400) → 6.0/10

Provider Reputation6.1/10

provider avg 6.1 → 6.1/10

Popularity2.5/10

synthetic proxy → 2.5/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 60 — Apollo 77 by Smartsoft Gaming

https://slotranker.com/smartsoft-gaming/apollo-77#score

How to cite

Slot Summary

Apollo 77 fills the gap between a conventional five-reel slot and a mission-led bonus game. Smartsoft Gaming released it in 2019 with a Moon and Space setting, a 98% RTP and an x250.00 maximum win. Ordinary symbol combinations sit beside an astronaut mission system and a separate Bonus Game, giving the compact 5x3 format a task-based identity.

How It Plays

Base spins use a 5x3 grid and eleven regular symbols. Matching symbols form wins, while the Wild Symbol substitutes to help complete ordinary combinations.

A mission can ask for a named symbol to be collected within a limited set of spins. The astronaut display communicates both the target and its associated reward.

Theme & Atmosphere

Moon, Space and Star themes shape Apollo 77 as a fictional lunar expedition. Recorded communications and mission prompts give the setting an operational tone.

Sci fi presentation supports the task system, while satellite, helmet and lunar imagery keep each objective connected to the larger space-flight premise.

Space Star Moon Medieval Sci fi

Features & Win Potential

The 98% RTP is the game's standout numerical property, while the maximum win is x250.00. No volatility level appears in the supplied catalog facts.

The Wild Symbol supports regular combinations, and the Bonus Game provides a separate result path. These features add structure without replacing the basic reel format.

Wild Symbol 5 Reels Bonus Game 98% RTP

Bonus & Free Spins

The Bonus Game uses a small matching task in which the selected symbol must align correctly before the exit result ends an attempt.

Ship-flight rewards depend on how far the flight advances, while completed astronaut missions award their displayed values. Both mechanics extend the Moon expedition beyond base spins.

Spec sheet

Apollo 77 at a glance.

Identity

Slot nameApollo 77

StudioSmartsoft Gaming

Released7/26/2019

Math

SlotRanker Score60

RTP98%

Max win250×

Bet range$0.25 – $100.00

Player rating3.5 / 5 · 18 votes

Format

Reels5

Paylines—

Layout5x3

Features

Themes

Expected average based on this slot's 98% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$2.00

Cost per session$2.00

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on Apollo 77? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: Mediumassumed — not published for this slot

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (Medium). The model is calibrated so the average return equals this slot's published RTP (98.00%), with wins capped at its top multiplier (250×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play Apollo 77

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Compare Apollo 77 with other games

	Apollo 77 Score 60This game	Rocket Stars Score 73	H.O.P.E. Score 70	Moo Snatchers Score 69	Astro Reels Score 57
Identity
Studio	Smartsoft Gaming	Evoplay	Nemesis Games Studio	Kalamba Games	Reevo
Released	7/26/2019	4/10/2020	10/17/2021	5/27/2024	7/31/2024
Math
RTP	98%	96%	96.6%	95%	95.58%
Volatility	—	High volatility	—	High volatility	Medium volatility
Max win	250×	2,174×	—	5,000×	—
Format
Reels	5	5	5	5	5
Layout	5x3	5x3	5x3	5x4	5x3
Paylines	—	20	25	15625	30
Min bet	0.25	0.1	0.1	0.2	0.3
Max bet	100	300	125	100	30
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	—	✓	✓	✓	✓
Scatter symbol	—	✓	✓	✓	✓
Multiplier	—	✓	—	—	✓
Bonus game	✓	—	✓	—	—
Respins	—	—	—	—	—

Every number is shown as a delta against Apollo 77.

Comparing against

Apollo 77

Smartsoft Gaming

RTP

98%

Max win

250×

Score

+ Free Spins+ Scatter+ Multiplier− Bonus Game

+ Free Spins+ Scatter

+ Free Spins+ Scatter− Bonus Game

+ Free Spins+ Scatter+ Multiplier− Bonus Game

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01What is the RTP of Apollo 77?

Apollo 77 has a listed RTP of 98%. Its maximum win is x250.00, and stakes range from 0.25 to 100.

02What happens during the mission system?

The astronaut presents a target symbol and a required collection goal. Completing that task within the available spins awards the displayed prize.

03What special features does Apollo 77 include?

The catalog records a Wild Symbol and a Bonus Game. External descriptions also identify ship-flight rewards and symbol-collection missions as parts of play.

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