Inside Dr. Enlarge-O
Across a catalog of 500+ Greentube titles, Dr. Enlarge-O was the title we kept going back to. Greentube committed fully into the mad scientist concept, and the result pays off. This review breaks down the reels piece by piece next.
Across the Reels
Across the reels you'll meet Dr. Enlarge-O, a secretary, an electrode, a lab burner, a potion bottle and forceps. Wild duty falls to the wild — watch for it across the reels. Scatter duty goes to the generator — position does not count, only the count. Wild plus scatter hands Dr. Enlarge-O two engines for surprise wins.
Feature Breakdown
Land three scatter symbols anywhere in view on reels 1, 3 and 5 triggers 10 free games and Dr. Enlarge-O's Free Games takes over — arguably the game's best moment. Bonus pacing ran fair during our test sessions — not flooded, not starved.
Stakes, Paylines & Payouts
Worth flagging, Dr. Enlarge-O accommodates large bankrolls — the stake ceiling tops out at 1250, far past the standard slot. With 25 lines in play, dry stretches stay tolerable. As with any slot: luck rules single sessions — play inside your bankroll.
Try Dr. Enlarge-O Online
Looking for a place to spin? Canada777, Miami Dice and FlashDash carry Greentube games including Dr. Enlarge-O. Enjoyed Dr. Enlarge-O? Comparable reels include Rex and Dolphin's Pearl Deluxe, each from a similar style.
Dr. Enlarge-O: Our Bottom Line
Final take: Dr. Enlarge-O gets the fundamentals correct and adds enough surprise on top. Greentube has 500+ titles to its name — yet Dr. Enlarge-O remains among the ones worth revisiting. Mike Hunt|Mark Lacey put Dr. Enlarge-O through full testing for Nodepositcasinoguide; data verified on July 18, 2026.
Pros
- Bonus rounds included: Playing this slot machine you will be able to trigger the Free Games bonus that is launched by three scatter symbols anywhere in view on reels 1, 3 and 5 triggers 10 free games.
- Wilds plus scatter symbols: Not only can you win more completeing winning combinations with wild symbols, this game also contains scatter symbols to give more winning combinations.
- Game uses 25 lines and 5 reels: Great game using 25 lines in combination with 5 reels allowing for a maximum win of $75,000.
- Big bets supported: The stake range tops out at 1250 a spin — well above the typical slot.
Cons
- This one doesn't use progressive jackpots: Winning large payouts is the best part of playing slots, progressive wins are usually very large. Most progressive games usually have a lower return, though people may find the missing jackpot as a con.
- Demo version missing: There isn't a demo version, so first-time players start at live stakes.
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Frequently Asked Questions
What type of game imagery can you see in the game?+
Dr. Enlarge-O consists of Dr. Enlarge-O, a secretary, an electrode, a lab burner, a potion bottle and forceps to deliver on the mad scientist feeling, also you will find a purple spade, a red heart, a blue club and a green diamond icons.
Does Dr. Enlarge-O contain wild symbols?+
This mad scientist based slot machine has wild icon for replacing other symbols.
Is there scatter symbols included in the slot?+
Yes, the generator symbol allows for winning while not being in sequential order.
How much can you bet on a spin?+
Bets run from 0.01 to 1250 per spin, covering penny players and bigger bankrolls alike.
Which casinos carry Dr. Enlarge-O?+
Dr. Enlarge-O appears at casinos carrying Greentube titles, such as SpinBetter and Crowngreen.
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