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4.9
Instant PayoutsCrypto AcceptedLive Casino
500% up to $1000
+ 150 Free Spins
InOut Games • Tetris-Inspired Slot
Mega Block — Stack & Cascade
Coloured construction blocks stack into a variable grid, Tetris-style. Match colours into clusters of five or more for payouts. Cascade engine clears matched blocks while fresh ones drop. Multiplier Blocks land randomly and boost any cluster they join. The Mega Block Bonus compresses several blocks into one supercharged cluster.
96%RTP
5,000xMax Win
InOut GamesProvider
Block Building, Multipliers & Mega Block Bonus
Each round drops coloured construction blocks onto a variable grid in the spirit of Tetris. The blocks settle wherever they fit, and any group of five or more touching blocks of the same colour forms a paying cluster. Bigger clusters pay more, and the grid itself can shift in size between rounds — sometimes you get a tight 6-row layout, sometimes a sprawling 8x8 build zone. That variable footprint is what makes the math behave differently from spin to spin.
Multiplier Blocks land at random and look just like regular coloured blocks except for the value badge stamped on top. When a Multiplier Block becomes part of a winning cluster, its value is applied to that cluster's payout. Several Multiplier Blocks in a single cluster stack together — two x3 blocks in the same cluster pay nine times the base, and the rare x10 block can swing a single cluster into the high hundreds. They appear roughly every 7-9 spins.
The Mega Block Bonus triggers when a winning cluster grows past a set size threshold — usually 12 connected blocks. The grid then compresses several blocks into one supercharged Mega Block that counts as a whole cluster on its own. Cascades clear matched blocks and let new ones drop into the gaps, and inside the bonus those cascades chain until no fresh wins form. The 5,000x cap lives at the end of a long cascade chain with stacked Multiplier Blocks inside the bonus.
96%
InOut Games standard rate.
5,000x
Via Mega Block cascade chains.
High
Cascade-driven swings.
4+
Block shapes and bonus types.
Mega Block Free Demo
No Registration Required
Big Win Potential
Experience Mega Block! Try the game mechanics and features risk-free with our free demo mode.
96%
RTP
5,000x
Max Win
High
Volatility
$0.10
Min Bet
$50
Max Bet
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Experience the full potential of Mega Block using virtual credits. Learn the game rules and bonus rounds.
Master Mechanics
Discover all special features, expanding symbols, and multiplier mechanics without any risk.
Instant Play
No sign-up, no emails, no downloads. Access the full gameplay instantly from any browser.
Mobile Optimized
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Bonus Mechanics Explained
4 mechanics drive the 5,000x max win. Here's exactly how each one works.
Multiplier Blocks
How to Trigger
Multiplier Blocks drop at random onto the grid, marked by a value badge on a coloured block.
What Happens
A Multiplier Block looks like any coloured block but wears a value badge. When it joins a winning cluster of five or more, its value multiplies that cluster's payout. Two Multiplier Blocks inside one cluster stack — a pair of x3 blocks pays nine times base, and the rare x10 block alone can drag a single cluster into the high hundreds.
Multipliers
Block values: x2, x3, x5, x10.
Odds
Appears roughly every 7-9 spins. The x10 block is the rarest draw.
Strategy
Flat stake. Value comes from Multiplier Blocks stacking inside one large cluster, not from single hits.
| Drop Rate | ~1 per 7-9 |
| Block Values | x2-x10 |
| Top Block | x10 |
| Stacking | Multiplies |
| Grid | Variable |
Mega Block Bonus
How to Trigger
Build a winning cluster of roughly 12 connected blocks.
What Happens
When a cluster grows past the size threshold, the grid compresses several blocks into one supercharged Mega Block that counts as a whole cluster by itself. Denser drops and more frequent Multiplier Blocks follow, and cascades chain until no fresh cluster forms.
Multipliers
Driven by stacked Multiplier Blocks caught in the cascade chain.
Odds
Trigger needs a 12-block cluster — a high-variance event on the variable grid.
Strategy
Bigger clusters both pay more and edge you toward the threshold. Ride out the full cascade chain.
| Trigger | ~12-block cluster |
| Mechanic | Mega Block |
| Cascades | Chain to end |
| Multiplier Blocks | More frequent |
| Max Win | 5,000x |
Cascade Wins
How to Trigger
Any paying cluster clears and lets new blocks drop into the gaps.
What Happens
Every cleared cluster removes its blocks and drops fresh ones from above. If the new arrivals form another cluster, the win repeats with no extra stake. Inside the Mega Block Bonus these chains run longest, and the 5,000x cap sits at the tail of a deep chain with Multiplier Blocks stacked in.
Multipliers
No fixed cap — depends on Multiplier Blocks caught mid-chain.
Odds
Hit frequency tracks the High volatility profile at 96% RTP.
Strategy
Cascades are free re-drops. Nothing to time — let each chain resolve fully.
| Cost | Free re-drop |
| Chains | Repeat on new cluster |
| Best In | Mega Block Bonus |
| RTP | 96% |
| Max Win | 5,000x |
Buy Mega Block Bonus
How to Trigger
Buy option from the base game where operators allow it.
What Happens
Pay a fixed multiple of your stake to drop straight into the Mega Block Bonus without building the trigger cluster naturally. Mechanics match a natural entry.
Multipliers
Same as a natural bonus.
Odds
Available where legal; matches the base 96% RTP.
Strategy
Weigh the buy price against how often the 12-block trigger lands in your own play. Keep a 500x+ bankroll for repeated buys.
| Cost | ~100x bet |
| Feature | Mega Block Bonus |
| RTP | 96% |
| Legal | Varies |
| Bankroll | 500x+ |
Mega Block FAQ
Frequently asked questions about the game
Mega Block has an RTP of 96%, which is on par with the slot industry standard. InOut Games certifies this figure for the standard game configuration deployed by operators.
The grid fills with coloured blocks each round. Connected blocks of the same colour form clusters. Clusters that meet the minimum size threshold pay out, then those blocks are removed and new ones fall in from the top.
The Mega Block Bonus is the main feature round, triggered when a winning cluster reaches a specific size. During the bonus, blocks fall faster, multiplier blocks appear at a higher rate, and cascade chains are more frequent.
Each winning cluster removal creates space for new blocks. If those new blocks form a cluster, you win again without placing a new bet. During the Mega Block Bonus, cascades can chain several times in a single round.
The maximum payout is 5,000x your stake. Achieving this requires a series of cascading wins with stacked multiplier blocks during the Mega Block Bonus — most likely over a multi-cascade chain.
Yes. InOut Games builds in HTML5 for full cross-platform play. Mega Block runs in any modern mobile browser on iOS and Android without requiring an app installation.