Stars!

Stars! is a turn-based 4X strategy game set in space. It was made for Play By Post multiplayer; as such it uses Simultaneous Turn Resolution (simultaneous phase-by-phase, and with AI-only combat) and optional dedicated server executable.

It was made for Windows, but doesn't require capabilities beyond very basic; as such it runs flawlessly on other x86 under Wine - or in Windows 3.11 run under DOSBox, for that matter (though this may be not so easy to set up from scratch).

Officially Abandonware. The only not quite free part are serial codes (you need one per human player in a game, except those on the same computer), and those are given for small donations on the server maintenance. See "Get Stars!"


 * All There in the Manual: "Guts of" (formulae and algorithms) cloaking, bombing, mineral packets, etc.
 * Arbitrary Maximum Range: Weapons either function at nominal efficiency or don't reach.
 * Boring but Practical: Colonizer hull. Privateer hull.
 * Death From Above: Mineral packets
 * Deflector Shields: Shields recover only between battles. Shield generators are very light, but far weaker than armor of comparable Tech Level - of course, often slots are shield-only or armor-only anyway. Beam weapons have lesser range, but are light (allowing greater mobility), always hit and have greater damage - which shields absorb point by point. Conversely, missiles are long-ranged, miss a lot, but shields absorb only 1/2 of their damage (plus 1/8 of damage from missed ones).
 * The shields are weak per component, but are stacking from the whole "token" (all ships of the same type in a fleet), thus if a ship type has shield and if there are enough of them, it takes 2x as many hits to destroy the first one even with missiles. When there are few ships, shields are inferior to armor, which in turn usually is inferior to mounting more weapons (General Purpose slots allow all these components and more). This have obvious strategical implications: e.g. 1x shield + 2x torpedo destroyers are cheaper, faster and stronger than their 3x torpedo counterparts... but only if you keep them in big enough packs: e.g. with TL 0 shield against TL 0 torpedo (though hull and armor at Construction TL 3) it takes 18 ships to fully use this advantage - neither you nor enemy are likely to churn out such fleets before a better design is available; with shields on the same TL 3 (in Energy) it's 12, and with everything at TL 6, it's only 9 ships. Later in the game both shields get better and fleets grow, so missiles become the main weapon again, despite introduction of both missile jammers and "shield sappers" that inflict even greater damage, but only to shields (and fire before other weapons, of course).
 * Regenerating Shields lesser racial trait gives shields 40% greater full capacity and regeneration 10% of the total each round (unless completely drained), but value of armor components is halved (hull dp is not changed). Combined with shield stacking it can be ludicrously strong against beams, but low armor makes means missile performance is the same as it would be without RS and shields. Shield sappers can still chew through RS, but it will take longer. This also means RS works better in early game (torpedoes and armor are still weak anyway), for players with strong jammers (cheap Electronics advances help), Inner Strength PRT (exclusive jammer components reduce threat of missiles; Fielded Kelarium uses armor slots yet also adds shield value, allowing smaller stacks or shielded 3x weapon destroyers; Croby Sharmor adds to armor dp value as well as shield, but since it's a Shield type component, this "bonus" armor is not halved) and War Monger PRT (early rush to make good use of Weapons tech advantage, exclusive tougher hulls later). It weakens starbases badly, since there's only one (Improved Starbases LRT can compensate by allowing tougher hulls, but for Alternate Reality PRT it's worse, as their starbase is the colony).
 * Design-It-Yourself Equipment/Socketed Equipment: Ships and starbases. But the total number of designs in each category is limited to 16 slots, and upgrade is possible only for starbases. Thus you need to recycle old ship types just to free their slots.
 * Easy Logistics: Only mostly. Ultimately, minerals can be created with Mineral Alchemy, but it's expensive. Antimatter is produced endlessly by docks, Fuel Export hulls and scoops, but you may still need some monkeying.
 * Fan Remake: CraigStars!, FreeStars (+ Frontier Project, Étoiles, My Own Stars!, ZStars! and GStars! clients), Stellar Legacy, Stars! Nova and HxNova, plus Thousand Parsec engine.
 * Final Solution: It's not MoO2, one species per planet only. Bombs, mineral packets, troops or de-terraforming, your choice.
 * Gatling Good: 4 weapons, though only 2 available for everyone. Hit all targets in range, also 4x mine sweeping value.
 * Imported Alien Phlebotinum: Mystery Traders offer exclusive components and ships built of them. Most of this stuff is awesome, but tend to have multiple and high Tech Level requirements.
 * Many are combinations of different component types - most not as good as common components you'll have on those tech levels, but due to using a slot type different from some of the common equivalents allow greater optimization or use of hull types normally unable to perform a given function or highly inefficient at it.
 * Enigma Pulsar: It's an engine with built-in maneuvering jet. What could be better for beam ships? And a weak Cloak, but never mind that. The last common engine will be more economical, but Enigma also runs up to warp 5 for free, so there's that.
 * Mega Poly Shell (Armor): Cloak and Jamming (usually would need specialized components in Electrical slots), plus Shield and Scan.
 * Langston Shell (Shield) gives Cloak, Jamming, Armor, Scan.
 * Multi-Function Pod (Electrical) aside of combining Cloak and Jamming effects gives you Movement bonus (normally only two Mechanical components do).
 * Multi-Cargo Pod (Mechanical) gives Cloak and Armor (otherwise extra dp are provided only by things that go into Armor and Shield slots).
 * Multi-Contained Munition (Beam Weapon) has weak effects of a cloak, guidance system, minelayer pod plus decent penetrating scanner and bomb, with very modest mass. It's weaker than beam weapons you'll have, but now you can stop making ponderous bombers good for very little beyond their primary function and being an expensive mobile fuel tank, and instead build bombing warships - light enough to use stargates, with decent protection so the won't fall to the cheap interceptor fleets and even when not bombing they still scan and lay mines (at least you won't need to use up one more design slot for a dedicated minelayer)!
 * They also circumvent component restrictions from racial traits: Langston Shell, Mega Poly Shell and Multi-Contained Munition are penetrating scanners you can build despite No Advanced Scanners LRT; Alien Miner is weak as a mining robot, and secondary benefits are of dubious usefulness for a miner ship, but it's much better than the only basic component you have with Only Basic Remote Mining LRT.
 * Jack of All Trades: A Primary trait allowing extra population and free scanner automatically upgraded to your Tech Level in any ship built with either of 3 small "scout" (Scout, Frigate, Destroyer) hulls, and a boost to starting Tech Levels.
 * Generalized Research lesser trait allows to allocate only 50% of research spending on the chosen field, but gives 15% into others, i.e. adds up to 50%+5*15%=125% total research points from the same resources. As such, it has minor positive cost.
 * New Tech Is Not Cheap: Each item becomes cheaper by -4% per Tech Level exceeded in all prerequisite fields (if it has any), until its resource cost drops to 24%.
 * With Bleeding Edge Technology lesser trait the cost of a new technology is 2x until its Tech Level is exceeded, but improvement is -5%/level with 20% bottom. This sucks on highest-level items, however, since there's no room left for improvement, thus you're just stuck with double cost until the end.
 * No Recycling: Painfully averted. You will have to scrap old ships. There's even Ultimate Recycling lesser racial trait that increases efficiency of mineral recycling and allows to recover some Resources (added to the planet's Production points on the next turn).
 * Overdrive: Any engine, even if it's Tech Level 0 and rated for Warp 5, can fly at Warp 9 (81 ly/turn) without damage. They simply consume more and more fuel the faster they go, thus even ships carrying a lot of fuel can't exceed their nominal speed much for more than a few turns, especially with cargo. Ramscoops have lesser (for their Tech Level) nominal speed and collect more fuel than spend up to even lower (by 1-2 more notches) speed; they also have consumption curve raising even sharper, so exceeding the nominal speed wastes too much fuel to cover any significant range. This affects logistics and design, especially on larger maps: ships that commonly need short bursts of speed to intercept enemies (patrols also need nominal speed, to catch up with evading targets on tactical map) or mineral packets have "classical" engines, and are refueled by slowly following supply ships (scoops, or even caravans with big fuel tanks) between short bursts of high speed. Far-ranging (scouts) or overweight (miners) classes need acceptable guaranteed minimum speed, but almost never go overdrive, so they get scoops.
 * Our Wormholes Are Different: They allow instant travel, but drift and are not entirely stable (though if one end of a wormhole is on your scan, you can see its current stability level).
 * Planet of Hats: Every race has one Primary trait. Though "Jack of All Trades" is included. Most have exclusive ship/starbase components and multiple bonuses related to their area of expertise.
 * 1) Hyper Expansion (reproduce faster, but to lower pop cap, colonize easier, no stargates)
 * 2) Super Stealth (masters of sneaking)
 * 3) War Monger (better offensive capabilities, but only basic planetary defenses and no mines)
 * 4) Claim Adjuster (masters of terraforming)
 * 5) Inner Strength (better at defense and repair; no advanced bombs)
 * 6) Space Demolition (everything related to mines)
 * 7) Packet Physics (lobbing mineral packets and reaping various advantages from this. 2 starting planets in universes > Tiny)
 * 8) Interstellar Traveller (masters of stargates, but mineral packets are subpar. 2 starting planets in universes > Tiny)
 * 9) Alternate Reality (live on starbases, thus production, mining and colonization work differently; can build better starbases; more vulnerable except to packets, interstellar travel kills some colonists)
 * 10) Jack of All Trades (nothing outstanding, but free penetrating scanners on small hulls, greater pop cap and higher starting Tech Levels)
 * Point Build System: Custom races.
 * Portal Network: Stargates - an Orbital type component (i.e. can be used only for Starbases). They have range and mass limits (only sending gate matters, not destination), which you may exceed up to 5x each, but gated ships may be damaged (it's not enough kill a ship, unless it's exactly 5x... or it was already damaged) or vanish (which is not the same as fatal damage). Also, you can't gate cargo, thus ships will just dump it at the colony.
 * Interstellar Traveller primary trait among the other perks allows to transport minerals and colonists, reduces damage for exceeding safety limits and later allows to build exclusive stargate components, up to ∞/∞.
 * Hyper-Expansion primary trait prohibits building stargates.
 * Jump Gate MT component allows the equipped ships to jump from deep space and with cargo. And since for stargates only the sender's limits matter at it doesn't have any, jumps are ∞/∞. You may need to move away from the colony for 1 year before jumping, however.
 * Ramscoop: Ram Scoop engines are rated for lower nominal speed (which affects fuel consumption and combat mobility) than normal engines of comparable Tech Level, and when moving another 1-2 notches slower than this, produce surplus fuel. There are trade-offs: consumption raises with warp speed much steeper than for normal engines, so usually it's impossible to exceed the nominal for more than one year; Space Mines inflict more damage on ships with scoops and on fleets including them. Also, they are heavier (which matters mostly on smaller ships or when gate-ability is important, and may reduces combat speed further) and more expensive. On the upside, ability to sustain moderate minimum speed for unlimited range makes scoops most useful for ships that can't carry enough fuel to reach objectives in reasonable time (unless the map is small) - scouts need to go far, while remote mining ships and bombers are massive. Which is one more way to break Easy Logistics on big maps, creating niches for solutions like chains of fuel depots (which scoops also help to resupply).
 * This applies even more to Radiating Hydro-Ram Scoop, with lowest Tech levels of commonly available scoops, that gradually kills transported colonists in the same fleet unless the race got rather high radiation optimum (not even maximum) value. This means not only freighters with rad-scoop are limited to hauling minerals, but e.g. armed escorts with scoops would have to dance around a transport or colonizer as a separate fleet without merging.
 * No Ram Scoop Engines LRT makes most scoops unavailable, which means greater dependence on big starbases (that developing colonies cannot build before dozens of turns) and later Fuel Export ships (expensive and fragile). Though can be compensated with Improved Fuel Efficiency LRT (it gives a weak scoop early on, and two of the best engines much later).
 * Space Mines: Three types - Standard, Heavy (greater damage, but less hitting) and Speed Bump (no damage, only stops ships). Minefields attack enemy ships traveling above certain warp speed and thus prevent a sudden invasion—an important part of the game. Ships equipped with Ramscoop engines suffer more damage; those that aren't tend to rely on fragile fuel transports, and since mines, like missiles, aren't fully negated by Deflector Shields, unarmored ships are killed easily.
 * Space Demolition PRT specializes in mines and have everything related to mines improved. They have all 3 mine types, specialized minelayer hulls that double mine laying output, can drop mines on the run, have minefields double as scanners, and are much more capable both of surviving mine attacks and using their own mines offensively. They also use minefields as detection arrays—if used correctly, this makes sneaking up on them almost impossible: move fast and get blown up, or move slowly and be detected early. Or run into normal and heavy mines, have surviving ships stopped by speed traps and detected—unable to repair without blown up supply ships or even run away due to still being stuck in the middle of 3 overlapping fields. War Monger PRT can't build minelayers at all.
 * Spiritual Successor: Very likely to be inspired by VGA Planets - it uses many of the same concepts, but has a competent AI.
 * Tech Level: 6 fields.
 * Terraform: Common, for each of 3 variables separately. Claim Adjuster is a Primary Trait specializing in it - they have free auto-upgraded terraforming, permanent terraforming chance and their mineral packets hitting a planet terraform it toward their references. Total Terraforming lesser trait improves it.
 * Genesis Effect: Genesis Device (MT technology) refreshes the planet on which it was built.
 * Hostile Terraforming: Claim Adjuster has exclusive toys for this - "Retro Bomb" (undoes terraforming and ignores planetary defenses) and Orbital Adjuster (goes into mining robot slot and terraform friendly planets to the benefit of their owners and hostile/neutral to the owner's detriment).
 * 2-D Space
 * Vaporware: Stars! Supernova Genesis.
 * Wiki Rule: http://wiki.starsautohost.org/