Okay so let me explain. I will explain why Defender is S tier last.
Lesser Drone despite its weakness, I’ve never had more fun or laughter just spawning in and tail stabbing marines in the face; running amok; & being a genuine nuisance. You can always be a Lesser Drone as long as there is a Queen. You can just W key and do as you want. Its truly freeing. S tier xenomorph.
Spitter being S is definitely bias however since the medical overhaul acid damage actually works properly & is a great xeno for many reasons. Why fun? It has “Charged Spit” which means you can take on any marine 1:1. You have the luxury of 7 tile range & the 80% movement speed buff. Incredibly tanky and hard to kill. Find a spare Spitter sister and you have a duo that can make all marines pain crit in less than one second so its just a great time. Getting pain crit wilhelm screams from marines is my drug as Spitter.
Ravager is S tier xenomorph for similar reasons it has variability and easy to learn (honestly). Easy to learn, hard to master. You can be Hedgehog (Bristleback) and just spray marines with your quills. Its a great time. Don’t be afraid to be a bald Ravager it is one of the best tiers and is always useful.
Burrow is S tier xenomorph. Love burrowing. Dig dig dig a tunnel. Another freeing experience similar to the Lesser Drone in that; you are actually a liability in combat so chilling & waiting behind the assault front is not seen as lazy or uncanny. You can lay mines & dig dig dig a tunnel. Stomp is always great fun. You can just spend all day harassing marines in the FOB like some of my evilest sisters have done. Burrow into the FOB, Stomp, Burrow out. Observe the marines sprinting madly in all directions trying to find you. Its great fun.
Defender S tier. I know. I’m actually BOP and I love BOPPING talls on the head with my crest. Aim head; and just envision your tail or crest bashing the ever living daylight out of any confident marine. I don’t know maybe I just like giving people head trauma (XX). All around the most “new to game” friendly xenomorph. Similar to the ravager: Easy to learn, Hard to master.
Praetorian & Crusher get the short end of the stick in A tier. Praetorians are fun but if you aren’t careful you die immediately. Crusher are fun but if you aren’t careful you die immediately. That for me is a fun ender. Praetorians different classes all have different fun tiers of their own, although nothing will be as fun as Warden that xenomorph is S+ tier. Crusher is a personal favorite of mine. Properly hitting your Charge as standard Crusher gets the Wilhelm scream from marines; sends them ragdolling into all barriers; & its just a good time if you are able to hit Charge properly. If not Crusher quickly becomes D tier fun because no offense to the Charger strain: I hate W key charging into marines.
Queen is almost C tier. S tier xenomorph B or C tier fun as a xenomorph. Mainly cause you HAVE to do some amount of building & you HAVE to command the xenos. It would be nice to have strained Queens where instead of getting Acid Spit natively you can strain to have like a little escape leap or headbutt or tail sweep. Thats for ideaguys but know the Queen is limited in fun due to the need to perfect and perform so many important PVP tasks as well as PVE tasks.
Carrier albeit can be incredibly fun however its dependent on others actually bringing you captures/you knowing how to trap a map and capture marines solo. Highest skill ceiling of all xenomorphs is incredibly daunting but once you accept however bald you are and learn to play to your strength its a great time.
Hivelord B tier. You can absolutely have S tier fun with Hivelord given its the faster xenomorph & just an absolute unit of a builder (find a PHONK song pause it, wait from a marine to try to shoot you, press play; turn on Resin Walking; Tokyo Drift to your hearts content). Marines can not touch you on resin without explosives. Plain and simple.
Okay onto our C tier sisters.(As someone above mentioned these are all sprite clickers)
Runner C tier. It’s fun to be the second fastest xeno for about as long as it takes you to be the scout who relays that the Marines have laid claymores down (XX). I think I sneak better with drones and play better as a Lurker. runner is complete utility and if you do that well it’s fun. Good luck sprite clicking.
Lurker C tier. Absolute A tier unit that can singlehandedly make Marines worry about turning corners or entering dark spaces. Being invisible only has a fun playtime of about 100 hours then you learn it’s a complete utility ability and if you use it when you’re not ready you are as good as dead.
Drone C tier. Now don’t get me wrong I love being a drone at times. Now that Drones can strain and be used for everything the Queen does but worse, sometimes you just feel like a little princess. However Drones are absolutely trashed on by other xenomorphs and you will be the first to told to haul captures back if there are no runners. If there is a good spread of xenos and two runners this moves up to B tier fun.
Warrior C tier. I hate to mention playtime but I’ve played SS13 CM for as far back as having our playtime stats set back to zero twice. I have never been able to hit Lunge in a way that makes Warrior fun. Absolute unit of slash damage and life steal. CQC is where the fun is with warriors.
Boiler C tier. Strongest (gassiest) xenomorph in that almost every hive needs one. Which is why Boiler is C tier to me. Globbing then running in to do StarCraft Zerg roleplay to the Marines is great fun. When Neurotic stab was first introduced I never had more fun. Incredibly high skill ceiling.
Sentinel C tier. This xeno is the only sister whose on the edge of D tier fun. Like having a rating of 1 out of 5 on ratemyprofessor dot com : you just get depression being this xenomorph at times. Definitely a useful sister and if you enjoy playing Sentinel it’s a necessary xeno to a strong hive however that’s just how I feel when I can’t evolve into my S tier fun Spitter. Depression.
Okay D tier xenomorphs…. These guys are for memes. Which at times is S tier fun. I remember my evilest burrower sister making a sneaky tunnel in the FOB and me and three other huggers were able to hug 11 Marines before they got smart. I never remember laughing harder while playing this game I actually cried. You just had to be there.
Tl:Dr have fun?