You're probably thinking iCE40.

Note ECP5 and Nexus support is similarly good by now, and these families have larger FPGAs better suitable for miSTer cores.

There's now also some support for GW1N/GW2N FPGA families from China. These have the advantage of being relatively quite cheap, and I hear they have FPGAs with 250k+ LBs coming, with RISC-V hard cores built in.

Wow that sounds cool. I'm playing around with the UP5K (pico ice) right now with apio and it's already the dream. With bigger FPGAs the sky would be the limit.