What is Megasaur? It's a five-reel, 25-payline dinosaur slot from RealTime Gaming, released in 2015, with a progressive Megasaur Jackpot paid on volcano symbols, two Megasaur wilds and a free-spins pick feature. Its return to player isn't published by any source we trust, so treat it as a game of unknown cost.
What makes it distinctive is the jackpot rule: the progressive is tied to volcano symbols, with the share of the meter depending on how many land. It also has two different wilds and a pick-your-spins bonus. Our Megasaur slot review covers the game in detail; this page answers the common questions, and the questions hub has many more.
Megasaur slot specs at a glance
Megasaur specs from third-party sources
Spec
Figure
Source
Developer
RealTime Gaming
VegasSlotsOnline, PokerListings
Released
2015 (date shown as 11/10/2015, format unclear)
VegasSlotsOnline
Layout
5 reels x 3 rows
VegasSlotsOnline
Paylines
25
VegasSlotsOnline, LCB
RTP
Not published (one listing shows 0%, which can't be right)
VegasSlotsOnline
Volatility
Medium
VegasSlotsOnline
Top non-progressive prize
$400 (2,000 coins)
LCB
Progressive
Megasaur Jackpot; three jackpot levels
VegasSlotsOnline, LCB
Megasaur doesn't appear in SlotCatalog's RTG catalog, which is the source for most of our RTG figures. That's one reason its numbers are thinner than for games like Aztec's Millions.
How Megasaur's features work
The sources describe four moving parts. Here they are in plain terms, without adding anything they don't say.
Green Megasaur wild (reel 2): substitutes for other symbols to help complete wins. See our wild symbol definition.
Red Megasaur wild (reel 4): also substitutes, and doubles any win it helps form.
Megasaur Feature: a pick bonus where you choose between 2, 5 or 10 free spins.
Volcano scatters: pay up to 300x your total bet and are also the key to the progressive.
None of the sources explains how the three free-spin choices differ beyond their count, so we don't guess. If the help screen at your casino shows extra detail, such as multipliers attached to each option, rely on that.
The Megasaur progressive jackpot explained
According to LCB's Megasaur listing (opens in a new tab), the progressive Megasaur Jackpot pays a share of the meter based on volcano count: 100% for five, 20% for four and 10% for three. LCB also describes three progressive jackpot levels, which appear to match those three tiers.
Megasaur progressive payouts reported by LCB
Volcano symbols
Share of the progressive meter
Example if the meter shows $10,000
5
100%
$10,000
4
20%
$2,000
3
10%
$1,000
The $10,000 is our illustration only, not a published meter value. Sources don't say whether a minimum bet is needed to qualify, so read the game's help screen first. Jackpots are rare by design; our jackpot odds guide explains why, and what a progressive jackpot is covers how meters grow.
Megasaur RTP: why it's missing and what to assume
No trustworthy RTP exists for Megasaur in our sources. VegasSlotsOnline shows "0%", which is clearly a placeholder, and SlotCatalog doesn't list the game at all. So the real long-run cost of play is unknown.
To budget sensibly, use a range. Listed RTG slot returns in our data run from 94% (Aztec's Millions) to 98.5% (Swindle All the Way), with most between 95% and 96.25%. Here's what 100 spins would cost on average at the edges of that common band, assuming Megasaur falls inside it.
Expected cost of 100 Megasaur spins at assumed RTPs (illustration)
Spin size
Total staked
If RTP were 94%
If RTP were 95%
If RTP were 96.25%
$0.25
$25
$1.50
$1.25
$0.94
$1
$100
$6.00
$5.00
$3.75
$5
$500
$30.00
$25.00
$18.75
A $50 budget covers 200 spins at $0.25, 50 at $1 and just 10 at $5 before any wins return. For how the percentage works, see what RTP is.
Is Megasaur high or low volatility?
VegasSlotsOnline rates Megasaur as medium volatility, the only rating we found. Medium means results are less spiky than high-volatility RTG games like Aztec's Millions, but sessions can still swing sharply, especially when a big share of the game's value sits in a rare jackpot.
Volatility doesn't change the average cost; it changes how far one session can drift from it. Our volatility explainer shows how to factor it into your stake size.
Megasaur vs other RTG dinosaur and jackpot slots
RTG slots similar to Megasaur (SlotCatalog unless noted)
Slot
Released
Listed RTP
Volatility
Jackpot
Megasaur
2015
Not published
Medium (VegasSlotsOnline)
Progressive, three levels (LCB)
T-Rex
2009
97.5%
High
Progressive
T-Rex II
2019
Not published
Not published
Progressive
Aztec's Millions
2015
94%
High
Progressive pooled across casinos (Wikipedia)
Achilles
2012
95%
Medium
Progressive
The original T-Rex is the dinosaur option with the best-documented return, at 97.5%. T-Rex II is named on Silver Oak's own mobile casino page. If you want a medium-volatility progressive with a listed RTP, Achilles is listed at 95%.
How to play Megasaur for real money, step by step
Check your state's law on online casinos first; most states don't license any.
Search the casino's lobby for Megasaur, since no partner confirms carrying it.
Open the help screen to read the jackpot rules, any qualifying bet and, if shown, the RTP.
Choose a stake that gives your budget plenty of spins, such as $0.25 or $1 rather than $5.
Set a deposit limit and a stop point before you start, and treat the jackpot as a long shot.
If you win a large amount, read the casino's withdrawal limits and keep records for taxes.
Megasaur in the USA: legal status and taxes
Megasaur is an RTG game found at offshore casinos, and no US state licenses or regulates those casinos. Only seven states license real-money online casinos. Offshore play means no state regulator for complaints, no state protection of your balance, and terms set by the casino; see offshore casinos and the law.
A jackpot is taxable federal income. For slot winnings paid in 2026, the IRS W-2G reporting threshold is $2,000, and the loss deduction is reportedly capped at 90% of losses from 2026; check IRS guidance. Our taxes on casino winnings answer has more.
Where to play Megasaur: RTG casinos with offers via our links
We couldn't confirm Megasaur at any of our seven partners, so no partner fits this game exactly; search the lobby before depositing. We've listed three partners reported to run RTG whose reported bonus terms don't mention a progressive exclusion, with Slot Madness first because a third-party review reports a progressive-games bonus there. All three are offshore and not licensed by any US state; check your state's law. Offers are for new players aged 21+ (18+ where allowed), and terms apply. We earn a commission, and the order is commercial.
Slot Madness: $2,500 Welcome Bonus + 50 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). LCB reports 275% with code MAD275, a $30 minimum, 30x (bonus + deposit) on slots and no max cashout. A 2025 esports.gg review (opens in a new tab) also lists PROGRESSIVE100, a 100% match for progressive games with a 10x max cashout on $30–$1,000 deposits; codes change, so check before you rely on it. Slot Madness is reported not to accept Ohio players.
Planet 7: $2,750 Welcome Bonus + 45 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). Third-party listings report a 200% code with 30x (bonus + deposit) on slots and a $1,000 max cashout, with free spins unconfirmed, so follow the terms at sign-up.
Royal Ace: $2,500 Welcome Bonus + 35 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). One review reports 200% up to $4,000 at 30x on slots with a max cashout of 10 times the deposit; another reports 250% up to $2,500 plus 35 spins. Royal Ace is reported not to accept Ohio players.
Michigan's Gaming Control Board sent Planet 7 a cease-and-desist letter on April 9, 2025 (opens in a new tab) and ordered Slot Madness to halt services on August 14, 2025; Royal Ace wasn't named. Free spins are slot-only, and table games are often excluded or weighted lower. If jackpot chasing is costing more than you planned, call or text 1-800-MY-RESET (1-800-697-3738) (opens in a new tab).
Ad21+ (18+ where allowed). Ranked by us in a commercial order; we earn commission from these links. Advertiser disclosure
No partner's own pages or reviews confirm Megasaur, so search the lobby. Slot Madness is first because a third-party review reports a bonus for progressive games there. All three are offshore and not licensed by any US state.
Published terms (reported): Third-party reviews report a 275% match up to $2,750 with code MAD275; the casino site could not be checked directly. Eligible games: Slots and keno (reported).
Who runs it: License not shown; third parties report Anjouan, Costa Rica or none. Regulator notes: Named in a Michigan Gaming Control Board cease-and-desist release, August 14, 2025.
21+ (18+ where allowed). New players. Min deposit $30 (reported). Wagering 30x deposit + bonus (reported). Max cashout: None (reported). Withdrawal cap $2,500 / week (reported). Terms source: reported. Terms apply. Offer checked October 28, 2026.
Planet 7 Casino#5 on our listRealTime Gaming slots
Published terms (reported): Third-party reviews report a 200% match with code WELCOME200; the casino site could not be checked directly. Eligible games: Slots (reported).
Who runs it: License not shown; third parties report Costa Rica or none. Regulator notes: Named in a Michigan Gaming Control Board cease-and-desist release, April 9, 2025.
21+ (18+ where allowed). New players. Min deposit $30 (reported). Wagering 30x deposit + bonus (reported). Max cashout: $1,000 (reported). Withdrawal cap $2,500 / week (reported). Terms source: reported. Terms apply. Offer checked October 28, 2026.
Royal Ace Casino#6 on our listSlots and specialty games
Published terms (reported): Third-party reviews disagree on the package (200% up to $4,000, or 250% up to $2,500 + 35 spins); the casino site could not be checked directly. Eligible games: Slots and specialty games (reported).
Who runs it: License not shown; third parties report Costa Rica or none. Regulator notes: Third parties report it does not accept Ohio players.
21+ (18+ where allowed). New players. Min deposit $30 (reported). Wagering 30x deposit + bonus on slots (reported). Max cashout: 10x deposit (reported). Withdrawal cap $2,500 / week (reported). Terms source: reported. Terms apply. Offer checked October 28, 2026.
These casinos are offshore operators. They are not licensed or regulated by any US state, and state consumer protections do not apply. Check the law in your state before you play. Terms marked “reported” come from third-party reviews; the terms shown at sign-up apply.
21+ (18+ where allowed). Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: responsible gambling tools and free help. Gambling problem? Call or text 1-800-MY-RESET (1-800-697-3738).
Frequently asked questions
What is the RTP of Megasaur?
No reliable RTP is published for Megasaur. VegasSlotsOnline shows 0%, which is a placeholder rather than a real figure, and SlotCatalog doesn't list the game. Most RTG slots in our data are listed between 95% and 96.25%, but that's a range, not Megasaur's number. Check the help screen at your casino for a stated figure. Our RTP explainer shows how to turn any percentage into a dollar cost.
How do volcano symbols trigger the Megasaur Jackpot?
LCB reports that the progressive Megasaur Jackpot pays on volcano symbols: 100% of the meter for five, 20% for four and 10% for three. Sources don't say whether a minimum bet is required, so read the game's help screen before you play. Landing five volcanoes is rare, and no pattern makes it more likely. Our answer on how often jackpots hit explains why nobody can predict it.
Who made Megasaur?
RealTime Gaming made Megasaur, according to VegasSlotsOnline and PokerListings, which names it among RTG's progressive titles. RTG began in Atlanta in 1998 and later moved development to Costa Rica, and since 2022 it has also used the SpinLogic Gaming brand for many markets, according to third-party sources. Read what RTG is for the company's background and the casinos that run its games.
How many paylines does Megasaur have?
Megasaur has 25 paylines on a five-reel, three-row grid, according to VegasSlotsOnline and LCB. Your total bet is spread across those lines, so check how the coin and line settings combine before you spin. LCB lists the top non-progressive prize at $400, or 2,000 coins. Our paylines definition explains how lines and ways to win differ.
What does the red Megasaur do?
The red Megasaur is a wild on reel 4 that doubles any win it helps complete, according to VegasSlotsOnline. A separate green Megasaur wild appears on reel 2 and substitutes without the doubling. Wilds help complete lines but don't change the game's overall house edge, which is built into the math. See our multiplier definition for how doubling wilds fit into a slot's payouts.
Is Megasaur a pooled jackpot?
No source we checked says Megasaur's jackpot is pooled across casinos. Wikipedia names Aztec's Millions and Jackpot Piñatas as pooled RTG progressives, while PokerListings simply lists Megasaur as a progressive title. Until a casino says otherwise, assume nothing about how far its meter is shared. Compare the designs in what a pooled jackpot is and what Real Series jackpots are.
Can I play Megasaur with a bonus?
Possibly, but many casinos exclude progressive slots from bonus wagering. SlotoCash's welcome terms exclude progressive jackpot slots, and Silver Oak's terms exclude progressives. A third-party review reports a progressive-games bonus at Slot Madness, but codes change. Wagering multiplies your total stake and the expected cost. Read bonus game weighting and check the casino's terms before claiming.
Is Megasaur available at US online casinos?
Megasaur is an RTG game, so it's found mainly at offshore casinos that run RTG software. None of our partner casinos' pages or reviews confirms it in their lobby, so search before you deposit. Offshore casinos aren't licensed by any US state; check your state's law in which states allow online casinos.
Can I play Megasaur on my phone?
Probably, if a casino carries it, because RTG casinos run in the mobile browser rather than through an app. Silver Oak's own mobile page lists browser play on iPhone, Android and tablets, and third-party reviews describe Planet 7 and Slot Madness the same way. None of our partners confirms Megasaur in its lobby, though, on mobile or desktop, so search for it on your phone before depositing. Check the help screen there too, since jackpot rules should match the desktop version. Our Planet 7 mobile page and mobile casino guide explain browser play.
How long will a $50 budget last on Megasaur?
Before any wins come back, $50 covers 200 spins at $0.25, 50 spins at $1 or 10 spins at $5. Because Megasaur's RTP isn't published, we can only illustrate the cost: if it returned 95%, staking the full $50 once would cost about $2.50 on average, and wins recycled into more spins would stretch the session further. Medium volatility means results can still swing well away from that. Smaller spins give the jackpot more chances to land within the budget. See our gambling budget guide and the Megasaur slot review.
What is the biggest regular win on Megasaur?
Outside the progressive, LCB lists Megasaur's top fixed prize at $400, or 2,000 coins, and VegasSlotsOnline says volcano scatters pay up to 300x your total bet. The two figures are measured differently, one in coins and dollars, the other as a bet multiple, and the sources don't reconcile them, so read the pay table at your stake. The red Megasaur wild on reel 4 doubles any win it helps form. The progressive meter sits on top of all this. Our scatter symbol definition and what a progressive jackpot is explain both.
Is Megasaur better than T-Rex?
On published numbers, T-Rex is easier to judge: SlotCatalog lists the 2009 RTG slot at 97.5% RTP with high volatility and a progressive jackpot, while Megasaur, from 2015, has no published RTP and is rated medium volatility by VegasSlotsOnline. At 97.5%, $100 of spins costs about $2.50 on average; Megasaur's cost is unknown. If a known return matters, pick T-Rex. If you prefer steadier swings and the volcano jackpot, Megasaur fits. Compare them in our T-Rex review and T-Rex II review.
Do I pay tax on a Megasaur jackpot win?
Yes, a Megasaur jackpot is taxable federal income, whatever its size. For slot winnings paid in 2026, the IRS threshold for a Form W-2G is $2,000, so an illustrative $10,000 meter would be well over it. Offshore casinos may not send you a form, but the income is still yours to report. From tax year 2026, the loss deduction is reportedly capped at 90% of losses; check IRS guidance. Keep records of deposits and withdrawals. Our gambling taxes guide and W-2G explainer cover filing.
Is Megasaur legal to play for real money in Florida?
Florida doesn't license online casinos, and the Florida Gaming Control Commission says unauthorized casino-style games are criminal under state statutes 849.08 and 849.15. In February 2025 the commission sent cease-and-desist letters to offshore operators and warned players with a "bettor beware" message. The only lawful online sportsbook there is the Seminole Tribe's Hard Rock Bet. Offshore RTG casinos that may carry Megasaur hold no Florida license. Read our Florida online casinos page and Florida gambling laws before you play.
Does Slot Madness have Megasaur?
We can't confirm it. A third-party review says Slot Madness runs RealTime Gaming software only, with around 300 games, so an RTG progressive like Megasaur could plausibly be there, but no source names it in the lobby. Search before you deposit. The same 2025 review lists a PROGRESSIVE100 code, a 100% match for progressive games with a 10x max cashout on $30 to $1,000 deposits; codes change. Slot Madness is offshore and was named by Michigan's board on August 14, 2025. See our Slot Madness review and best progressive jackpot casinos.
We use no tracking cookies. We store one item in your browser to remember this notice. Casino sites may set their own cookies after you follow an advert link. Cookie policy
