Also a popular game nowadays called Fortnite has a song that plays when you are waiting for a match that sounds similar to Watcher of The Skies, although I'm not really sure if the autor was really inspired by this music style

What are your examples? :)

http://stevenwilsonhq.com/sw/last-day-june-cinematic-video-game-based-steven-wilsons-music/" rel="nofollow - http://stevenwilsonhq.com/sw/last-day-june-cinematic-video-game-based-steven-wilsons-music/

this track from the Diablo 2 game soundtrack is in my opinion a great prog track; after the first minute it gets really interesting:

The dude is one of my favorite composers. Back when he was on his golden run (and Square too) of FFVII, FFVIII, and FFIX... phew! I remember playing those games as much for the stories as I was for the music.

Nobuo Uematsu also was involved in The Black Mages, his hard rock band, listed here at ProgArchives as progressive metal, but I'm not too familiar with either FF games or his music. 

http://www.progarchives.com/artist.asp?id=2406" rel="nofollow - http://www.progarchives.com/artist.asp?id=2406

Another Japanese composer between prog and video games is Motoi Sakuraba ( http://www.progarchives.com/artist.asp?id=6843" rel="nofollow - http://www.progarchives.com/artist.asp?id=6843 ). His album list here is incomplete, as it's not featuring some but not all of his video-game OST (here's a complete-looking list : http://en.wikipedia.org/wiki/Motoi_Sakuraba%20" rel="nofollow - https://en.wikipedia.org/wiki/Motoi_Sakuraba ). Many RPGs, starting at the PlayStation golden age of Japanese RPGs, such as Baten Kaitos, Valkyrie Profile, and many Tales of... games features his bombastic keyboard-heavy style, à la ELP. Compare for instance the game-ripped version of track Heartless wilderness from Beyond the Beyond:

with the re-recorded and expanded version from the OST CD (love the galloping bass!):

In the 80's, Motoi Sakuraba was a member of the band Déjà Vu ( http://www.progarchives.com/artist.asp?id=75" rel="nofollow - http://www.progarchives.com/artist.asp?id=75 ), with the (according to me, cult classic) Baroque in the Future album.

Peter Gabriel was also involved in video-game music, contributing several tracks for the Myst games series (in Uru: Ages beyond Myst and Myst IV: Revelations). Lookup the word "Myst" in his wikipedia page:  http://en.wikipedia.org/wiki/Peter_Gabriel" rel="nofollow - https://en.wikipedia.org/wiki/Peter_Gabriel

Trent Reznor, of Nine Inch Nails fame (referenced here as Crossover prog  http://www.progarchives.com/artist.asp?id=5427" rel="nofollow - http://www.progarchives.com/artist.asp?id=5427 ) was also involved in the soundtrack for the classic Quake ( http://en.wikipedia.org/wiki/Trent_Reznor" rel="nofollow - https://en.wikipedia.org/wiki/Trent_Reznor ). Here is a Nine Inch Nails rendition of the Legend of Zelda theme :-)

Last thing that comes to mind: a number of composers in the wide array of recent genres related to electronic music (synthwave, chiptune, etc.) contribute to video-games, and some have clear prog-rock influences. The main contender here would be Disasterpeace (Rich Vreeland), famous for the Fez and Hyper Light Drifter soundtracks. Here's an interview where his prog-rock influences are discussed:  http://gameumentary.com/place-infinite-possibility-rich-vreeland-talks-disasterpeace-early-prog-influence-composing-orchestra/" rel="nofollow - http://gameumentary.com/place-infinite-possibility-rich-vreeland-talks-disasterpeace-early-prog-influence-composing-orchestra/   His work is better appreciated when you get the appeal to video-games nostalgia, heavily referenced in the sonority and sound modulations he uses, but even then, I believe some tracks really stand on their own regardless. For instance, the Majesty track from Fez:

I'm trying not to fall into the trap of "if I like it it must be prog", but I'll mention some close-cousins. Some video-game composers like Ben Prunty, Daren Korb, are responsible for some outstanding games OSTs, that I find original and "outside the box"; but I have no idea whether prog-rock is in their influences or not. On the other way around, there are some synthwave composers that output excellent material, clearly influenced by video-game sounds and tropes, but that are not necessarily tied to prog-rock. For instance, the Sunset Dreams track by Natural Phonograph could be construed as a close cousin to prog:

This area, of "instrumental synthwave meets so many things it sometimes feels proggy" is definitely currently exploding; that ProgArchives does not reference them makes its exploration more complicated to me. :-)

Finally, there were of course music games such as Rock Band or Guitar Hero that featured tracks by Dream Theater, Rush, Kansas or Yes, and they seldom were easy to play... ;-)

http://pryapisme.bandcamp.com/album/epic-loon-ost" rel="nofollow - http://pryapisme.bandcamp.com/album/epic-loon-ost

They always had a strong influence from old video game tunes, so not that surprising a development really.

 

An there are many artists involved that also have a Prog life.

 

Motoi Sakuraba was already mentioned and his live album is bombastic Prog of the highest

order. he also plays a lot with the drummer of White Fang and the short time Bass player of Ars Nova

(two other great Prog Bands)

 

 

 

From the live album: Tracks from Star Ocean and Valkiery Profile Video Games

Hi,

Haven't heard all of these yet, but if there is one thing that I have found somewhat sad in so much of the music used for many of these games, it is how short and designed to repeat it is, rather than also being shown as serious music.

Loved the music in Final Fantasy, and it was just sad for me to hear it over and over again, when there were some wonderful passages, and little development after it.

Reminds me of the guy that made an album of music for EVERQUEST, and Sony promptly ignored him, and the work he put together, though not to be used in the game itself, I do not think, was very good. 

Conversely, Blizzard put together some nice things for various zones and areas, and they did not expand on it, either. They put it on a loop, and that has a tendency for me to not enjoy it anymore.

There were also some really nice Anime stuff that had great music, but again, it was all in small Hollywood snipets, and for me, a progressive listener die-hard, stuff like that has a tendency to kill the music. It's bad enough they cut up Mike Oldfield for a lousy movie, but at least Vangelis has survived that in several films.

But I am not quite comfortable discussing music for games. I do not consider that kind of stuff "serious" music that deserves more attention. Maybe it's too commercial for my tastes and I prefer the development of the themes and such.

Contra 3: The Alien Wars for SNES is probably my favorite video game soundtrack. The music to me sounds like it was inspired from 70s Jazz Rock/Fusion. Mainly a mixture of Jean-Luc Ponty, Herbie Hancock (early 70's - Headhunters era), Mahavishnu Orchestra and some Return To Forever. All with a Sci-Fi influence added into the mix.

Listen and compare for yourself:

This one always reminds me of Contra 3

There's also this Return To Forever track where in the first minute and elsewhere, sounds like it came from a Sonic The Hedgehog game for Genesis.

Nice to see Motoi already get a mention. Those are great silver platters.

That said, here's Tangerine Dream's official GTA 5 score.

Some songs that I can't remember (sorry) have an instrument that is very similar to the Mellotron used in "Los Endos" or in the end of "Blood on The Rooftops", by Genesis

Links:
https://www.youtube.com/watch?v=3EWa_yV1JDE&feature=youtu.be&t=15
https://youtu.be/EeZRdd_1b4g?t=299

^THIS post, right here! I'm glad I'm not the only one; I hear SO much Herbie Hancock influence in Sega Genesis OSTs, it's not even funny. Lightning Force (Thunder Force IV) is like straight 70's fusion. 

So much Chick Corea and Herbie Hancock influence in all the early 90's 16-bit classics. Which would make sense, seeing as it was 20 years out from that time period. Designers and the like were probably listening back in the day!

I have so much to add to this thread when I'm not on mobile!

I started a blog where I try to find such occurences. If you are interested, I'd be happy to welcome you:

https://www.destructoid.com/blogs/PhilsPhindings/

Tim Follin! MASSIVE win. This same guy also did Silver Surfer for the NES, which is equally as amazing IMHO:

NieR, aside from having one of the best stories of any game i've ever played (since the 90's) has a soundtrack that rivals Xenogears, Final Fantasy, and the best from any you guys have mentioned and you you've mentioned great music from really great games!

The sequel, NieR Automata, is also equally well done in a similar vein.

Time signature changes in one of boss fight themes:  http://www.youtube.com/watch?v=yoP3oWOqLVo" rel="nofollow - https://www.youtube.com/watch?v=yoP3oWOqLVo

Of course Hollow Knight's OST is not progressive rock. But... maybe someday he's going to make something progressive? Here's one of the videos from his channel:  http://www.youtube.com/watch?v=DCsNiAkoBGA" rel="nofollow - https://www.youtube.com/watch?v=DCsNiAkoBGA

Hollow Knight is a masterpiece indie game anyway. 

https://www.youtube.com/playlist?list=PLFtnysvdzOmRZMy9CCaUe5-BEBBvzUQwf" rel="nofollow - https://www.youtube.com/playlist?list=PLFtnysvdzOmRZMy9CCaUe5-BEBBvzUQwf

Edit: you'll find that some games are not next to others of the same franchise. This is usually because I find removed videos and I have re-added them to the bottom of the playlist. I'm not going to take the time to sort almost 2000 videos

I was just remembering that Vangelis wrote the music for a specific game, but forgot its title ... I think I have it, and have to look at my collection!

https://en.wikipedia.org/wiki/Maestro_(video_game)

Now I have played or at least launched on emulators EVERY licensed game produced for Sega MD/Gs. I am always trying to invent (faux and not so) reasons why I dislike Super Nintendo. For example, scrolling shooters on Mega Drive sure win (there's nothing like Eliminate Down, Steel Empire or Wings Of Wor on SNES). 

Also the music on SNES usually sound too orchestral, too pompous and somewhat good old 30s-50s' Hollywood-wise - in MY personal opinion. 

By the way among the products of homebrew nature of the later era there are some literal classic prog compositions for use on Sega console - all were done by me myself the humble poster... http://www.progarchives.com/forum/forum_posts.asp?TID=120097" rel="nofollow - HERE THEY ARE MENTIONED . As of now they have never been released on cartridges, but I had some plans about the future release. 

Because of its very age and hardware contents, practically any possible sound on 16bit game consoles positively sounds like a kind of prog.