This is a list of the best online casinos for IGT slot games, compiled from my 10+ years experience playing their slot games online. Our IGT review below covers some of the biggest slot games from IGT and WagerWorks, the software provider's history, and some of the best features of its online casino games.

Background
International Game Technology, or IGT, has a long and rich history that has led to it becoming one of the biggest online casino software providers around today. IGT was first established back in the 1950s and is known as the company that founded video poker machines, which can now be found at the vast majority of all online casinos. IGT broke into Fortune's 100 fastest-growing companies and capitalised on this momentum by taking over fellow casino software provider WagerWorks in 2005, merging the two and vastly expanding their games library in the process both online and in land-based casinos.

IGT games
As one of the leading online casino software providers out there, IGT are responsible for hundreds of games which will be instantly recognisable to avid casino gamers. I first found out about them through brick and mortar casinos, on one of my frequent trips to Las Vegas. You'll find IGT games scattered around casinos up and down the Vegas strip. Historically, IGT made a big impact on online casino slots when it introduced themed slots back in 1990 in the form of Double Diamond and Red, White & Blue. One of my favourite slot games comes direct from IGT- the famous Cleopatra slot, which I believe to be superior to Aristocrat's Queen of the Nile despite both following a similar theme. For me Cleopatra is one of the first games I think of when I think about slot machines, both online and in real casinos, and although it has a lucrative payout structure and a good wilds scheme it is simply the fast-paced action and thematic Egyptian-style animation that makes me love it so much.
Another of my favourite IGT slots is Wolf Run, which you'll find at a ton of online casinos. In my experience I've found this to be one of the looser slot games around, paying out frequently. I always seem to manage a lengthy session when playing Wolf Run. Having taken a close look at the payout structure I find it similar to more famous slots like Luck o' the Irish and Mayan Riches, but without the fanfare. It might not get a lot of particular attention but for me it is a personal favourite. Who knows, maybe it's just because I'm a dog person!

An industry leader
As mentioned, IGT were responsible for bringing us video poker slots. It may seem unthinkable that they once didn't exist, but without IGT who knows how long we may have had to wait for our beloved pokies.
IGT have an appetite for breaking new ground in the casino industry and video poker was not their only first. In what would prove to be an industry-defining development, IGT delivered the first ever progressive jackpot slot named Nevada Megabucks, boasting a cool $1 million jackpot. Since then progressive jackpots have come on leaps and bounds, including one of the most popular slots ever invented - again by IGT - in the form of the Wheel of Fortune progressive slot.
I personally really enjoy playing progressive jackpots, even though I know the odds of winning a 7-figure sum are minimal, largely due to the rush of knowing that any spin could change my life. Although it's never expected, there is definitely a different experience watching the reels spin and knowing you could win millions as opposed to hundreds. All of this is down to the contribution of IGT to the online slot game community.
IGT were one of the first to realise the potential of mobile gaming and pushed their mobile product long before iPhones and tablets were the norm, again showing how smart the company has been in judging the future of the online casino industry. I often enjoy a few spins when I'm out and about so I have experienced my fair share of poor mobile casinos, but IGT generally tend to offer a good mobile casino product. The graphics aren't quite as catchy as, for instance, Microgaming but I find it easy to pick up IGT games and get playing without any fuss on mobile.

Customisable graphics
Graphics are a big deal for most software providers. It would be nice to think that all of the focus of online casino games goes mainly into gameplay but, let's face it; a cracking animation can draw anyone in, especially causal gamers. Whilst I would argue that IGT does indeed place gameplay above graphics in its list of priorities, it does have one top feature regarding graphics which I think warrants a shout out. One of the things I like most about IGT games is that they give me the option to alter the graphics of the games they play. Why would anybody want to do this, you ask? The answer is simply to make up for lagging internet. Naturally, we all want the best animations possible when playing online, but sometimes I'm left cursing the screen as the casino freezes due to a poor internet connection. Seeing as a lot of the fun is in watching the reels spin or the cards fly out (for me at least) it's a great idea to allow players to sacrifice a little resolution in order to ensure animation remains smooth and fluid.

Summary
IGT has long been an innovator in the online casino industry, debuting progressive jackpots, themed slots and video poker slots among other forward-thinking ideas. In the late 1990s and early 2000s in particular the company gathered a great deal of momentum and never slowed down. I specifically remember taking notice when they purchased WagerWorks as part of a powerful ascendency towards the top of the online casino food chain.
With so many classic games and a strong presence in brick and mortar casinos it is unlikely that IGT's popularity will slow down any time soon, and why should it? I personally love IGT and find all of their games good value. The animation might not be up to the high standards set by industry leaders but it is far from shabby, and for me personally the most important thing is gameplay. With games like Cleopatra I and II, Monopoly Plus, Siberian Storm and hundreds of others, I rank IGT among my top few casino software providers. Whilst some people would not regard IGT in the 'elite' bracket of the best online casino games software providers around, I personally would say it is up there, knocking on the door at the very least.