>>16784535
>Although, I hear that there ISN'T even a canon to the series
you heard fucking wrong. There is a multiverse. Every Gilliam Jaeger is the same dimension-hopping badass from Hero Senki
that said, the sub-series tend to stand alone and the metaplot tends to only come up when Dark Brain is seeking the twelve keys to the multiverse (he's the antagonist of Great Battle, the series which SRW itself spun off of, and OG Gaiden)
>Should I just pick up Compact and use that as my entry into the series?
you might want to consider one of the ones in English
original series:
SRW1 (GB, PS3 (jap only)) is basically a unit tactics game with minimal story. Recruit apparently sentient robots and kill GirGilGan from one of the Mazinger movies
SRW2 (NES) and 3 (SNES) is where the series found its footing. 2 holds that the heroes fought GirGilGan at some point in the past, semi-canonizing 1
SRWEX (SNES) takes place between 3 and 4, and tells the midpoint of Masoukishin (convenient since Masoukishin has something of a timeskip there)
SRW4 (SNES) isn't in English just yet but AGTP (like it or not, they're the ones doing these) recently finished the script so it should be out soonish
Masoukishin - The Lord of Elemental (SNES) is the first fully OCdonutsteel game, featuring the storyline of Masaki's Cybaster and the other Elemental Lords in La Gias
alpha series:
only Alpha Gaiden is playable in english at this time. Picks up 6 months after the end of Alpha 1 and thus just after the end of episode 5 of Gunbuster
you can blame Harmony Gold for killing what would have otherwise been an all-hands-on-deck official translation and localization of the Alpha series
GBA series (sort of):
A Portable (actually for PSP) is fucking great but very challenging as SRW titles go. Have fun pursuing the Nadesico, stopping colony drops and shit
J (GBA) has rather amazing graphics for the GBA. On the easy side but you might find yourself dying to unforeseen situations the first time through (Domon suddenly spawns next to Devil Gundam and must survive but he's getting a beatdown because you didn't know to cover him. Like that). Features BrainPowerd (with perfect animations for the Brains compared to Alpha 2's), Tekkaman Blade (fuck yeah) and is the only appearance Zeorymer in the series. Also the best way to experience Gundam SEED (you know, so you don't have to watch SEED)
original generations:
Original Generation 1 & 2 (GBA) tell the plot of SRW2 and 3 with copyright friendly donutsteels, notably the ATX team from Compact 2, the SRX team (originally from Shin), and numerous OCs from Alpha. Also Masoukishin because Cybaster's cool enough to be in everything
other OG titles have been translated as well, including The Moon Dwellers for PS4 (tells the story of J with OCs)
misc:
PlayAsia's been providing English language copies of many of the recent games. I wouldn't necessarily say they're the best entry to the series, but they too are options
I'm sure I've forgotten one or another but yeah