This game has really caught my eye, and it's been on my Steam wishlist for awhile, but I wasn't sure how good it was. Sounds like you give it a hearty thumbs up!
What the hell are you waiting on?!?? Get this ASAP on Steam during Black Friday madness. Or I'll find you in forums and beat the living feathers off you Duck!
Space Engineers is the space version of Minecraft meeting Gary's mod with superior graphics. It's got single player, multiplayer, Co-op and online multiplayer modes. Single player is fully fleshed out with sand box and campaign modes. But IMO, online multiplayer is where most of the action and challenges are at. And that recommendation is coming from a lone wolf PvEr who prefers Solo gameplay
Little known fact: Space Engineers has consistently beat ED in player base participation on Steam top 100 games. Seems space legs has given it a constant boost of some 2000 or so more players v. ED ever since it left early release.
https://store.steampowered.com/stats/
It's currently $20 USD now but will likely drop to at least $10 or so during the holidays. Remarkably stable, with zero performance/frame rate/network server issues. And an addictive sandbox (and mission based) game play for a game that recently left early release. Even though it's out of early release phase, the devs are still adding more solid game play feature and mechanics to it. It now has three DLC packs that were recently released a few months ago.
These DLC packs are dirt cheap and totally worth the price.
Note The Space Engineers - Economy Deluxe DLC is MANDATORY, since it adds the much requested and vital game economy to the game. Besides some great customization skins, there are vending and ATM machines you can now add to your sandbox base build as functional modules. These allow you to trade with NPCs (if single player) and/or with other players/within your Squadron/wing/group organization (if playing in the other multiplayer modes).
Heck, it even includes SKINS for your base safe zones. Safe zones are an awesome feature which extend an indestructible shield around the surface of your base. So no other players can access/enter your base air space unless you give them permissions.
Base shielding/defense exclusion zone is shown at 0:15 (no skin) and 2:10 min (shows several of the new skins) in the video below. The DLC pack adds 14 awesome safe zone skins that you can add to make your base stand out in really cool textures. Gives you a PvP/ganker free zone (yes it's a PvE oriented game but there are some really great player orgs which RP pirates and do clandestine raids on other player bases etc). But the sole purpose of the safe zone shield is that its passive defense system grants you complete peace of mind lol I hope ED can get a feature like this some day where we can protect our ships when landed on planets.
btw while you're window shopping and strategizing on what to buy:
Get the PC version of RDR2 as soon as R* releases it on Steam. I'm still playing on XBX1 and happy to say RDR 2 has restored my faith in R*. I thought they had departed from their single player /RP dev roots like Bethesda, with their release of that husk of a shell that GTA V was. Get it because it seems RDR 1 remastered will be the real deal some time later as well. And since they're on PC, then three more words for game longevity: MODS baby MODS.