I appreciate this is more just a fantasy/wish post but after replaying the campaign and restarting on 800% apoc I really feel the tech tree concept is a great idea that I feel could've been used for more than just the campaign.
Imagine a more long-form alternative gamemode, a "career mode" where you start from tech level zero and have to upgrade your tech as you win survival rounds?
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In this example the player selects one of several randomly presented survival maps that are offered that you must play one of them. Perhaps each map has a random positive and/or negative modifier (50% more food from Fishing Cottages but there are guaranteed to be venoms in all swarm waves). Maps

