favorite retro and indie games?

Starcraft: Brood War (is free on competitive sites)

Cave Story (is free, paid version is deeply exploitative so don't)

Brogue (is free)

Master Of Orion 1 & 2 (a couple bucks on GoG)

Dicey Dungeons ($15 on itch, most expensive thing on this list)

SMW Kaizo hacks (yar har) (SMW itself still holds up too)

Desktop Dungeons (prototype version is free and better than the finished one)