It is the OG and iconic.

Historically more important than RX-78-2. First transforming mobile suit. Iconic face.

Ballsy asymmetrical design with fin funnels.

Massive and unique design.

Totally different from anything before G Gundam. Started the non-UC universe offshoot.

Extraordinarily superior Gundam with complex transformation mechanism.

Had a lot of mystery and hype around the transformation.

Had a lot of impact.

First Gundam to have smooth curves and first small mobile suit.

Ballsy design with mechanical arms that grab the shield.

Overdone, but started the mission pack trend.

Hovers between A and B tier, but not as good as Exia.

Has a samurai sword and many color variations/mission packs.

Classic design.

Solid, realistic design.

Iconic transformation and design.

Brought in a lot of female audience. Iconic wings.

Iconic design, but not quite S-tier.

Not S-rank, but better than C-rank. Exia is the best looking, then maybe 00.

Interesting story and design, great transformation mechanism. Hovers between A and B.

Great design, placed in B-tier.

Too fancy compared to Nu Gundam. Symmetrical design.

Syd Mead design. Courageous and different, but maybe too different.

Popular model kits, but the story wasn't that good.

Took no risks, just gave people what they liked (big wings, lots of guns).

Hovers between A and B.

Didn't look good until the Master Grade kit came out.

Design is okay, waiting for the movie.

Design is okay, waiting for the movie.

Very different, antique design. Not S-tier, but solid A-tier initially, then moved to C-tier.

Almost got cancelled, not as popular as Gundam Wing. Iconic design with the moon and satellite cannon.

Good design but low impact.

Great design, but moved to C-tier.

Doesn't feel special.

Not particularly cool, even with the EXAM system.

Nu Gundam prototype. Characters weren't memorable. Moved to D-tier.

Doesn't resonate with the story.

Just a way to reuse molds.

Complex transformation mechanism, small mobile suit, but sad story. Moved to E-tier.

Moved to E-tier along with Victory Gundam.

Pays homage to the original Gundam. Moved down to F-tier because Bandai might disown the series.

Pays homage to Zeta. Moved down to F-tier because Bandai might disown the series.

Pays homage to Double Zeta. Moved down to F-tier because Bandai might disown the series.

No relationship with anything else.