Highly recommended mods that seamlessly intergrated into Invisible Inc. gameplay. Most of the mods provide either more depth, or make the game a bit more harder (and more interesting too). It doesn't contain anything that could make the game easier like possibly unbalanced items or new programs. It also contains nothing that doesn't fit the original "lore" like new agents.

Notes: "Endlessified Compaign" allows you to set when it should start affecting your gameplay. It does make your run a lot more hardcore and it may be too much for newbies, especially with the default "day 2". You may want to turn it off for your very first runs. Let it stay if you want more challange. If you don't plan to play the game over and over, want to get the most of its content in your first (and the only run), but a bit scared of this precaution, set it to day 5 or so (if you have DLC), so it will affect your late game only. You should be ready for it by that moment.

Extended worldgen also provides increased diffuculty due to additionaly spawned security devices, so it's not only about newly designed rooms. If you're not ready for it, you may disable this function in the mod's settings.

New corporate tactics enables new reactions. Even though it provides reasonable default settings, I'd recommend you to enable cracked safes detection before new run ("noticed" for more immersion or "alarmed" for incresed diffuculty).

These are not the only "must have" mods for this beatuful game, just the ones I tested together in a couple of compaigns in the experienced and expert modes. "Programs Extended" should be also considered to be in the list, but I haven't tried it yet and don't plan to make any new runs.