Obviously this is highly subjective, but this is my personal tier list of all the Ross's Game Dungeon Episodes. I find myself rewatching RGD all the time and found that I rewatch some episodes more than others, and decided to make a tier list for how much I like them.
The games are listed in no specific order within each tier. Here is how I categorized them:
S tier - Best of the best, most entertaining, or something incredible or noteworthy about them
A tier - Very good episodes, very entertaining, have minor flaws or they lack that 'something special' to make it into S-tier
B tier - Good episodes, but there are some faults about them or they don't stand out above the rest
C tier - Alright episodes, still like them, but there are large aspects of them I dislike that are too large to ignore
D tier - I actively dislike these episodes.
Below are my notes about each episode. Not all of them have notes, if they don't have any means I don't have anything special to add beyond what tier I think they belong in.
S tier
Veil of Darkness - Simply an excellent episode. No dull moments, game and Ross's descriptions are super interesting, and the vampire takedown is legendary
Armed and Delirious - Ross was right, we all were changed after this episode. My own metric of insanity and madness in media was altered by watching this.
Cave World - I would rank this episode at A-tier normally, but the provenance of how Ross was able to play it, the translation software, and the chain of events starting from Nyet 3 is an incredible story
Trackmania 2 - Simply excellent episode - every moment of the review is interesting and entertaining.
Phantasmagoria 2 - In my opinion, the best RGD episode out there, close to perfection.
The Chosen, Well of Souls - Another very entertaining episode, probably belongs in A, but Ross's suffering of level 3 is noteworthy enough to bring it up to S tier
SpiderBot - Personal favorite. A short but excellent episode. This one is up there in the weirdness scale. The fact that Ross was able to gather so much insight from such a simple game is incredible.
Life is Strange - This episode is probably higher than where most other people would rank it, but is another personal favorite of mine. I find Ross's description of events and how he wants to respond to all the situations in game excellent. His criticism of the game is a breath of fresh air from the usual praise this game received.
Requital - Another simply excellent episode. Entertaining all throughout, nothing negative to say about it.
Deus Ex - Not much needs be said. An excellent review of the game with a legendary breakdown of real world issues.
Reals of the Haunting - Another personal favorite of mine, all killer no filler.
BipBop - A great episode, belongs in S tier simply for the fact that Ross saved the game from extinction.
Quarantine - This is the chronologically the first S tier Game Dungeon. Excellent throughout. This came out not too long after Freeman's Mind 1 ended, and it was the moment I realized that there is something special about Game Dungeon and it will be a worthy successor to FM.
Fahrenheit - Another excellent episode, not much to be said.
Sabotain - This one was a toss up, wasn't sure if it deserved to be in S or A tier. But then I realized that I found myself rewatching this episode numerous times since it came out, which means there must be something special enough to warrant S tier.
A tier
Apocalyptica - I especially love the intro of the Christmas "games" that were attempted, but the game level playthroughs do start being repetitive to watch, which keeps it from being S tier.
Maabuus
Martian Gothic - An excellent episode, but you do feel it's length near the end.
Secret World
Messiah - Another episode which might have been S tier if you didn't start feeling the length of it by the end.
The Division
Daemonica - Another personal favorite, wanted to put in S tier but couldn't justify it. Great episode but doesn't measure up to others in that tier.
The Crew - I'm sorry but the SKG has no bearing on my ranking of this episodes. They should stand on their own merits. And on it's own, this is another one which starts to feel a bit long near the end.
Dungeon Siege - If it was only about Dungeon Siege 1, it would be in S tier on quality alone, but adding the sequels review makes the episode a bit too long
Clans
Revenant
Black Mirror - Borderline S-tier. I feel it lacks just a tiny bit of that special something, I can't quite describe it
Polaris Snowcross - Personal favorite. Probably belongs in B tier but I find the time traveling band and the bonkers AI noteworthy enough to bring it to A
Harry Buster - My guilty pleasure. Belongs in B, or maybe even C, but I really like the singing vulture, adds so much character to a game that doesn't need it.
A New Beginning
Aida's Strange Christmas - B level review, but the weirdness of the game brings it up to A
Kabus 22
Outrun Clones
Gothic - A great review, but Gothic is one of the most talked about games out there which works against Ross. Review didn't have the special something like the Deus Ex episode did
Alan Wake - Excellent episode but Ross's analysis of the story felt a bit flawed. I think there is more to the narrative than he gave it credit for which took away from my enjoyment of it
Captain Zzap - B tier review, but the alternate reality shenanigans bring it up to A
Go to Hell - B tier review but the soul contracts bring it up to A
B tier
Tyrian - An early episode, solid but show didn't find its footing yet
Strife - similar to Tyrian
Baldies - Great episode but you do really start to feel its length
Gothos
Terror Trax
SiN
Hellgate London - Almost made A tier, but found that is not as entertaining on rewatch
Journeyman Project - Length is bit of an issue, likely due to it being essentially 2 parallel reviews in 1
Deus Ex Invisible War
Dues Ex Human Revolution - I think Ross glanced over the very good gameplay a bit too much. Mentioned it in a short segment before moving. There is plenty to criticize in this game, but it is still a very fun shooter despite those faults which I think should have been acknowledged a bit more.
Contraption Zak
Rama
Hinterlands
Uncanny Valley
Construction Bob Escapes from Hell
Arcade America
Bozo's Night Out
Helious - Alien story is entertaining but rest of episode is a bit bland
That Ski Game (no I am not looking up what it's actually called)
Nyet 3 - Almost made A tier due to weirdness but suffers from that early-episode clunkiness
Test Drive 3
Puzzle Agent
Echo - I wanted to put this in A tier as I really like this episode, but felt like it didn't quite belong there.
State of Mind - Another which might have been A but didn't quite make the cut.
Trick Style - Yet another which I wanted to make to A but didn't quite match the quality of those episodes.
Yuppie Psycho - This one was almost in C but the satire of corporate life brought it up to B
Normality
Culpa Innata - Another great one that feels a bit long
Quadralien - Another favorite of mine but couldn't justify going up to A
C tier
Last Stand
Darkspore
Carnevil
Sonic Heroes
Legend of Kyrandia
Mage Knight Apocalypse - this is a great episode but man do you feel it's length. It takes way too long to get going, first 30 of its 90 minutes is just choosing which character to play and going through the first mission. Past that point it is A tier quality episode, but I can't overlook that beginning.
Eternam
Wolfenstein - I think the blandness of the game spilled is so strong it affected the review itself
Potty Pigeon
Super Cult Tycoon
Conquest Earth - This one feels like it should be good, but I just find it kind of boring
Battle Forge - The review of the game is fairly short, large portion of it is dedicated to EA and games as a service. While an important topic, it does not make for an entertaining review, especially on repeat viewings.
Boppin - This one I feel is liked by most people but it doesn't really do much for me.
Legend of Kyrandia II
Killing time - Another one which I feel is liked by most people, but I find it not that interesting or entertaining, especially for its length
Halloween Sampler #2 - Would belong in D similar to Sampler #1, but I really like the Death Road to Canada segment
Follow Up Episodes - nothing special, had to place them somewhere
D-tier
Black Future '88 - I think this one is no surprise, widely considered the worst RGD episode. This episode feels like the developer asked Ross to make an episode he forced himself to write something while having no passion for it.
Zany Golf - Most of the episode is just complaining about EA
Death's Hangover - This one does nothing for me. Don't find the game or the commentary interesting or entertaining
Halloween Sampler #1 - The bite size commentary just doesn't quite work here