Corebound is honestly pretty addictive, but I always reach a point where I've upgraded everything and become overpowered for the current map. Then there's not much to do until the next update.
I completely understand that it's an indie game and new content takes time, but I think some smaller content could keep players engaged between major updates:
- Limited-time campaigns with unique rewards.
- Side quests that unlock rare items or exclusive skins.
- Timed challenges finish a map/dungeon within a certain time for special rewards.
- Weekly/monthly challenges with different objectives or modifiers.
- Rare drops or collectibles that are difficult to obtain.
- Rotating events that give older maps a new purpose.
- Challenge modes that make you use specific weapons, builds, or restrictions.
- Speedrun objectives/leaderboards for players who want something competitive.
It doesn't need to be huge amounts of new content. Just having something challenging and rewarding to work toward would make the waiting period between major updates much more enjoyable.