When comparing Zero-K vs Warframe, the Slant community recommends Warframe for most people. In the question“What are the best free PC games?” Warframe is ranked 15th while Zero-K is ranked 39th. The most important reason people chose Warframe is:
Warframes are essentially space ninjas that can move incredibly fast. Just running won't be enough, so you'll have to build momentum by sliding, jumping, and rolling. Each of these moves also help you dodge enemy attacks, while allowing you to attack. It takes a while to get used to the fast pace, but when you do, it feels incredibly satisfying.
Specs
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Pros
Pro Multiplayer online battles
You can create your own multiplayer battles, even password protected ones for playing with friends only.
Pro Expansive tech tree
Land, sea, and air. Choose your favorite play-style and use the appropriate tech tree. There are tanks, bots, walkers, planes, helicopters, boats, and submarines available to you.
Pro Flat tech tree
All units are available from the start of the game. There are no unit upgrades and you don't need to build certain buildings to reach the next level of unit.
Pro Awesome graphical effects
Despite it is an open source engine, the graphics are fantastic.
Pro Cross-platform game
There are versions for Linux and Windows. The easiest way to play in Linux is using Lutris platform.
Pro Fast-paced, space ninja action
Warframes are essentially space ninjas that can move incredibly fast. Just running won't be enough, so you'll have to build momentum by sliding, jumping, and rolling. Each of these moves also help you dodge enemy attacks, while allowing you to attack. It takes a while to get used to the fast pace, but when you do, it feels incredibly satisfying.
Pro A huge array of weaponry
Warframe boasts over 300 weapons, split into 3 classes: Primary, Secondary, and Melee. Primary weapons are the big guns such as assault rifles, shotguns, bows, and grenade launchers. Secondary weapons are the sidearms, usually handguns, machine pistols, and thrown weapons. The melee weapons consist of swords (even katanas), hammers, fist weapons, scythes, and others.
Most of the weapons have their own unique strengths and weaknesses. For example, the Simulor is a weapon which creates small balls similar to black holes, which pull in and kill enemies. Unfortunately, the range is very short, so you'll have to predict enemy movements and place the shots carefully. Another example is the Zarr, a massive canon, which has two firing modes, allowing you to use it as a canon or a shotgun. The downside is that you'll get damaged by your own explosions, so you have to always keep distance.
The weapons can also be upgraded, adding various elemental damage types such as radiation or corrosion. You can also improve other stats such as rate of fire, crit or reload speed.
Pro Great contact physics
Many online titles and MMOs feature combat with poor contact physics, so it often feels like you're not actually hitting the enemies. In Warframe, hitting an enemy with a hammer will make them fly and sliding at their legs will make them trip. This makes it feel more like a single player game than an online co-op game.
Pro You can choose your own play style
In Warframe, there are tons of weapons, both ranged and melee, that will let you fight however you like. Maybe you want to be a long-range sniper, or a massive melee beast with a huge hammer, or maybe you want to stick closer to the ninja tradition and use a sword and a bow. Whatever you prefer to play, Warframe has an option.
Pro Great selection of classes
In Warframe, you're able to play as one of the many Warframes, which are essentially character classes. You start off by choosing one of the three basic frames. Excalibur who specializes in swords and has an ability to equip an energy sword and shoot beams of energy. Volt who uses electricity to boost his damage, movement speed and attack speed. Or Mag, a frame specializing in magnetism and controlling the enemy. After that you can run missions to find plans for new ones, or purchase them with platinum (the real-money currency).
There are currently more than 30 basic Warframes and their "Prime" variants, which are superior versions of the basic frames.
Cons
Con Bad visual design
Obviously this is an open soruce project so nobody expects AAA level gfx but this one looks exceptionaly bad. Some of the weapon effects are hideous to look at. Simple things like UI buttons and color scheme seem to be visually out of sync with the way unit models and the map terrrain look.
It seems like a mishmash of visual styles which is probably a result of many different contributors of varreying skill levels.
There definately are visually consistent and pelasant ot look at open source games so The visual design of the game needs to have some sort of strcut guidline or rely primarily on the taste of a single individual from the ZK team.
Con Flat balance
The economy is very close to a Total Annihilation economy (despite all the changes they introduced) but the unit balance resembles games with harder unit counters like Warcraft and Starcraft. In Blizard games, there are different ways to limit what unit type or kind you can build at any stage of the game, like tech structures which the opponnet can scout.
In Zero - K this is not the case since there are no tech buildigns focusing the player on a certain unit type which can be scouted. You can make all units at all times. The gameplay design feels amateur and not thought through From the broadest perspective. It also manages to miss the advantages of the Spring engine and mixes the need to micromanage units that counter each other with big Area of Effect Weapons.
Con Crafting new equipment takes really long
The crafting system in Warframe involves very long wait times, varying from 12 to 72 hours. The wait times can be be skipped by paying platinum (bought in the in-game store with real money), but most of the time it's not worth it.
Con Can get repetitive easily
At the very core, Warframe is a game that needs a lot of grinding. You'll always be grinding for new blueprints, relics, materials, credits or just leveling your existing equipment. After a while some of the mission types such as defense (where you fend of waves of enemies), will get really boring. Then it turns out the blueprint or relic is really rare and you'll probably have to repeat that mission about a hundred more times. Coupled with the fact that there's no real progression outside the Mastery Rank, some players may quickly lose interest.
Con New content is poorly optimized
Warframe was released in 2012 and has received a lot of improvements over the years. This includes updating the old tilesets with new textures, which has caused a lot of performance drops. The prime example would be the Earth tileset update, which caused performance drops and made it unplayable to a lot of people, even though they could play normally before it.