Hello, Subterrain is one of my favourite game, very similiar to Dead State and other zombie apocalypsa game.

Thanks the developer for this game and hope they will make this game better and better with every update :).

Some tips:
1. at beginning collect everything, especially electronic resin, you will need it a lot in later
2. try to get data chip as soon as possible (in day 9 you should have all data chip level 2 or some level 3)
3. kill all enemies in the level, it decrease global infection level and you get alien sample (resources for crafting)
4. my favourite weapon is SMG, because of rate of fire (some people prefer pistol = sniper or shotgun, but I dont like their speed, thats why SMG), but if you prefer power, then pistol or shotgun.
5. later in game, prefer collecting electronic resin, alien sample and gems. Because you will be limited by your backpack when you go deeper and deeper, so prefer those resources. Especially gems, you can refine/recycle to the high tier ore (lithium etc..)
6. Data chip - level 2 datachip - floor 4 - VikingSquare, Carson hotel, Spirit Plaza, Solar Casino
- level 3 datachip - floor 3 - Aries District, Gemini District, Pieces District, Leo District
- Level 4 datachip - Floor 9 - Aries District, Gemini District, Pieces District, Leo District
*so you can easily get datachip level 3, but i prefer go to get datachip 2, because of resources you get during the way and also kill a lot of enemies for lowering infection level and alien sample
7. Key to generator room - you can find it in Central Room in console
8. Keep global infection under 30%, if you leave it go higher, alien will attack your generator room in your base.
9. Dont eat or collect "possible contamined" food (snack bar, cerealie etc.) or drink water from tap, you can get infection. Prefer sealed food in bottle or can.

10. BUY THIS GAME, you wont regret it :)