TGMC:Sentinel
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This page is a part of the TGMC wiki.
TGMC is a project based on the CM-SS13 codebase. |
| UNDEFINED XENO | |
 Sentinel |
Difficulty: Intermediate |
The Sentinel
Long time ago, the Sentinel's job ensured that captured marines remained in the hive and give birth to larvas. Sentinel's neurotoxin chemically restrainted marines, inhibiting their somatic motor abilties to even move a finger (though marines do flick off sentinel). Maybe the Sentinel was a reincarnated corpsman that had to deal with an uncooperative patient.
When the xenomorphs changed their method of reproduction from capturing to siloing, the Sentinel immediately changes their role in the hive, using their chem trails to hinder marines' push. From the aspiration of a forgotten experiment, the Afflictor, and its descendant, the Defiler, the Sentinel forces marine to remember and use their CBRN training so as to not have to breathe in the neurotoxin it produces.
Playing the Sentinel
The Sentinel's job is a frontline ranged caste that engage marines at a distance. To utilize the Sentinel, you must:
- Keeping your distance and suppress fire on marines'
- Denying areas and marines' push via spitting neurotoxin cloud
- Poke around corners to shoot at marines
- Coordinate with other xenomorphs to wreck marines
- Melting flares
As a Sentinel, your Intoxication is your main ability. An icon will appear under a victim, indicating the level of Intoxication. A blinking icon means it has stacked to a critical level, which is important for the Drain Sting ability. The critical level is 20 stacks.
In general, you want to apply this offensively by focusing a single marine so that you can stack up Intoxication. The more you stack, the more damage over time you give the marine. Your Toxic Spit may be weak by itself, but when paired with any of the other melee castes, you can debuff down marines, and then have your partner completely put them out of commission. Your Toxic Spit can go through friendly xenomorphs! Because of this, the Sentinel can help support combat inside and out of the hive as long as you never walk alone.
If yourself being pursued, you can always use your spit to ward off your pursuers and hopefully lead them awayYour spit can also be used as a disengagement tool and can give you the chance you need to flee and recover. Remember, the longer you live as a Xeno, the stronger you become, so fleeing is not just tactical, it's smart.
Your small size allows you to crawl through vents. Alt Click a vent to begin entering it. If you get a message that the vents are disconnected, a-help, as it's a known issue and the sooner it's fixed the sooner the rest of the hive can benefit. Regardless, you should always be keeping yourself busy with melting tools, barricades, medical tools, supplies, and anything else you think could be used by the enemy. Lamps should be melted to deny marines light, and if you see any APCS, you should slash them until you get a message that sparks fly out. Be careful not to get caught alone, and pay attention to the hivemind so you aren't caught off-guard when the marines land. If you are the first person to see them, you should shout them out over the hivemind, and tell how many, where they are, and where they appear to be headed.
One last ability you possess is your Corrosive Acid. Though you can't spit it at your foes, you can use it to melt anything of use to the marines. Your acid is generally weak and will take an excruciatingly long time to melt just about anything, but if you see a gun or a flare lying around, you might be prudent to melt it anyways.
Maturity Statistics and Evolution Paths
As a Sentinel, you can evolve into a Spitter. Spitters start out slower, but gain more health, lose neurotoxin spit in exchange for stronger acid spit, an acid slick that can trip up marines, and a scatter shot that can do extreme damage at close range, and their Corrosive Acid becomes stronger, and melts objects much much quicker. Spitters can then evolve into Boilers for long-range sieges, or Praetorians for devastating close-in combat support.
Maturity increases stats as follows.
- Slash is the melee damage when the xenomorph is in harm intent and slashing marine. In the code, it's melee_damage.
- Melee, bullet, laser, energy, bomb, bio, rad, fire, and acid are soft armor values, not hard armor, which means that they reduce damage by a percentage rather than a flat value.
| Age | Health | Plasma | Slash | Melee | Bullet | Laser | Energy | Bomb | Bio | Fire | Acid |
| Young | 225 | 300 | 14 | 15 | 15 | 15 | 15 | 0 | 15 | 15 | 15 |
 Mature |
250 | 450 | 14 | 20 | 20 | 20 | 20 | 0 | 20 | 20 | 20 |
 Elder |
275 | 550 | 16 | 23 | 23 | 23 | 23 | 0 | 23 | 23 | 23 |
 Ancient |
300 | 600 | 16 | 26 | 26 | 26 | 26 | 0 | 25 | 26 | 26 |
Your abilities can give Intoxication stacks, which increase for each maturity.
| Age | Toxin Spit | Toxin Slash |
| Young | 2 | 2 |
| Mature |
3 | 3 |
| Elder |
4 | 4 |
| Ancient |
5 | 5 |
Sentinel Abilities
| Ability | Description | Plasma Cost | Cooldown | |||
 Toggle Bump Attacks |
Allows you to toggle bump attacks on and off. This allows you to slash any enemy creature by running into them. The red arrow means it's on, you attack when on HARM intent; the green arrow means it's off, you push when on HARM intent. | N/A | N/A | |||
|---|---|---|---|---|---|---|
 Rest |
Used to rest and get up. You heal faster when resting on weeds. | N/A | 2 seconds | |||
 Psy Drain |
This ability is used on dead Marines. For every Marine's psyche drained, the Hive will gain between 30 and 90 psychic points, depending on the number of Marines spawned; and 1/8 of a larva. | 50 | N/A | |||
 Corrosive Acid |
Expels acid onto an object or wall, destroying it after a while. If used on wall, a hole will appear after some time. Small xenos can climb through, large xenos can break the wall with the hole on it open. CTRL + click to interact with the acid hole. During the prep phase, all xenomorphs with this ability get strong acid.
[Acid Strength by Caste]
|
75 if caste has weak acid; 100 for medium and strong acid |
N/A | |||
 Toxic Spit |
Spit toxin at a target or tile. Contribute burn damage and Intoxication stacks against marines. It goes back friendly xenomorphs for you use as cover. | 30 | N/A | |||
 Toxic Slash |
Imbue your claws with acid, inflicting the Intoxicated debuff with every slash. You won't have Toxic Slash after 4 seconds or after 3 slashes have been dealt. | 100 | 10 SECONDS | |||
 Drain Sting |
Sting your victim, draining some Intoxicated stacks and gaining benefits from it. It removes 30% of the current stack amount on use.
If the victim is above 20 stacks, this ability will increase all armor ratings by 20, for 10 seconds. Inflicts knockdown. The duration of this knockdown is proportional to the amount of stacks the victim has, minus 1 second. For example; 30 stacks equals 2 seconds, and 15 stacks equals 0.5 seconds. The minimum duration is 0.1 seconds. Deals a proportional amount of damage. The formula for this damage is: ( Amount of stacks * 6 ) / 5. This translates to a minimum of 1.2 damage and a maximum of 36 damage. Heals a proportional amount of health. The formula for this heal is: Amount of stacks * 6. This translates to a minimum of 6 health and a maximum of 180 health. Restores a proportional amount of plasma. The formula for this restoration is: ( Amount of stacks * 6 ) * 3.5. This translates to a minimum of 21 plasma and a maximum of 630 plasma. |
75 | 25 SECONDS |
Primordial Evolution
Once the hive has enough psychic points, your queen has the option to unlock powerful primordial evolutions for each strain. Primordial evolutions grant additional abilities for the relevant class.
For the Sentinel, this primordial ability is Neurogas Grenade
| Ability | Description | Plasma Cost | Cooldown |
|---|---|---|---|
 Neurogas Grenade |
Throw a ball of resin, which contains a toxin. This ball of resin will detonate shortly after landing, spreading a gas that inflicts the Intoxicated debuff to anyone caught inside its range. Deals 20 burn damage (before reductions) for every tick spent inside it. Inflicts 10 stacks of the Intoxicated debuff for every tick spent inside it. Allows other gases through, allowing it to synergize with other xenos such as the Defiler. | 200 | 50 SECONDS |
Sentinel Tips and Tricks
- You're ideal for after battle clean up. Melt any guns, knives, lights, flares, and tools you find lying around after the marines have backed off. Don't force the more important xenos to do this.
- Marines with big guns are bigger targets. Spit at them to wear them down and make it harder for them to chase down kills.
- Marines can simply pick up most equipment with acid on it and wipe it off, but they'll take a lot of extra damage if they do so.
- Even outright collapsing from stamina loss doesn't keep a marine down forever; if you rush in at the wrong time you might eat a shotgun blast even from someone you think you've downed.
- Your speed lets you make an effective ambusher when you partner with a runner. Flank the marines, wear down their speed and stamina, and have the runner drag them off screaming and gurgling in pain.
- One of the strongest and most surprising partnerships comes from a Sentinel Sentinel pair. Two xenos spitting at one target can build up intoxication fast, and both of you combined will do enough damage to take out someone you've crippled.
| TGMC Roles 
| ||
| TerraGov Marines | Command | Captain, Field Commander, Staff Officer, Pilot Officer, Transport Officer, Mech Pilot |
| Vehicle Crew | Assault Crewman, Transport Crewman | |
| Engineering and Supply | Chief Ship Engineer, Requisitions Officer, Ship Technician | |
| Medical | Chief Medical Officer, Medical Doctor, Researcher | |
| Marines | Squad Leader, Squad Smartgunner, Squad Engineer, Squad Corpsman, Squad Marine | |
| Civilians | Corporate Liaison | |
| Silicon | Combat robots, Synthetic, AI | |
| Xenomorphs | Tier 0 | Larva, Minions |
| Tier 1 | Drone, Runner, Defender, Sentinel | |
| Tier 2 | Hivelord, Carrier, Hunter, Wraith, Bull, Warrior, Puppeteer, Spitter | |
| Tier 3 | Gorger, Defiler, Widow, Ravager, Warlock, Behemoth, Crusher, Praetorian, Boiler | |
| Tier 4 | Shrike, Queen, King, Hivemind | |
| Others | Zombie, Emergency Response Teams, Sons of Mars, | |