Chaos land raider, its the Land Raider but spiky and with missiles instead of meltas. This unit is honestly more useful for Chaos Space Marines than it is for SPace Marines since they don't have orbital drop pods, but the Chaos Marines also have Rhinos (RHINOS!!) so they were kind of already covered in the METAL BAWKSES department. Just a more durable and offensive option I guess.
Edit: I slept a bit on the Land Raider, not taking into account the fact it has one very powerful trait: Assault Transport. The Land Raider is an Assault Transport (both the Traitor & Loyalist versions) which means that units inside the transport don't consume their movement points by disembarking, allowing them to charge to the full extent of their movement capacity. This allows the heavy infantry (Obliterators, Centurians or Terminators) hidden inside the limited cargo capacity of the Land Raider to storm deep into any gaps the Land Raider's guns can open up and wreak maximum havoc.


The Chimera is an interesting transport not only because its the only amphibious non-skimmer unit but also because it has secondary weapons that only activate as long as there's someone loaded into it. On top of that it has the ability to emit the leadership auras of the Commissar while he's loaded inside of it, making it a decent little safety-bus for your angry man with a big hat. An early game transport is nice to have for shipping your dudes around as quickly as possible but the Chimera doesn't really shine unless there's water breaking up the geometry of the map, giving you a semi-unique edge on such maps.


The Flayed Ones are something of a Necron fan favourite, or at least so I've gathered. I personally prefer Canoptek Wraiths for the role of stealthy melee murder boys but the Necrons do well enough with this addition as a cheap tier one option to deal with their complete lack of melee infantry prior to the Triarch Praetorians. While I'm not certain they're worth the cost of needing to be researched, Flayed Ones make themselves useful on densely ruined or forested maps against sheltered infantry units, sneaking up on them and tearing them to pieces in CQB, unscathed with their ability to ignore overwatch attacks.


The Razorback. Space Marine players have been wanting a low tier transport unit since the traitors got to call dibs on the Rhino with their launch roster to help with their general lack of mobility prior to drop pods, land raider and thunderhawk tiers of technology. Something of a monkey's paw the Razorback is TECHNICALLY a transport but only sports a whopping 2 slots and an anti-infantry turret. The upside to the Razorback is that it is very fast, able to travel over open terrain much, much faster than the infantry that it carries and faster than most other vehicles available to the Space Marines. The best use I've found for the Razorback is to transport the fragile Devastator Squad to the front lines to join a siege.


The Scythed Hierodule is a much needed super heavy for the Tyranids. Terrifyingly fast and uncompromising in its ability to blender anything in its path the Hierodule rounds off the Tyranid's lategame roster as a game-ender, able to close the gap and tear apart armies with astonishing ease.


The Tidewall Gunrig is a unit that looks like it fits in more with the Fortifications Pack but that came out before the Tau were released so here it is now. A mobile, hovering fortification with a single railgun, the Gunrig is a surprisingly useful addition to the Tau arsenal, lacking a reliable, long-range anti-armour option in the early game the Gunrig very neatly fills that niche for the boys in blue, able to be deployed anywhere from their versatile Builder Drones it provides long-range siege and fire support and shelter for their fragile troops, also functioning as a transport with an impressive 4 transport slots and requiring an infantry unit to be loaded to be able to move.
Edit: The Gunrig has been nerfed int he tech tree so its no longer an early game unlock, on the same tier as the Hammerhead which it shares a main gun with. Its still very good with the abiltiy for builder drones to deploy them in a pinch and functioning as a transport as well as a siege platform.


Warbikers effectively fill the same role as the Warbuggies but do it better. Speedy and mobile scout units with a relatively strong melee and short range machine-gun attack they effectively replace the little bug-bikes with the sole downside of needing to be researched while the Warbuggy comes with the vehicle structure by default. While being much more fragile than Warbuggies they're much faster and deal more damage, generally the deciding factor for hit-and-run units.

Chaos land raider, its the Land Raider but spiky and with missiles instead of meltas. This unit is honestly more useful for Chaos Space Marines than it is for SPace Marines since they don't have orbital drop pods, but the Chaos Marines also have Rhinos (RHINOS!!) so they were kind of already covered in the METAL BAWKSES department. Just a more durable and offensive option I guess. Edit: I slept a bit on the Land Raider, not taking into account the fact it has one very powerful trait: Assault Transport. The Land Raider is an Assault Transport (both the Traitor & Loyalist versions) which means that units inside the transport don't consume their movement points by disembarking, allowing them to charge to the full extent of their movement capacity. This allows the heavy infantry (Obliterators, Centurians or Terminators) hidden inside the limited cargo capacity of the Land Raider to storm deep into any gaps the Land Raider's guns can open up and wreak maximum havoc. The Chimera is an interesting transport not only because its the only amphibious non-skimmer unit but also because it has secondary weapons that only activate as long as there's someone loaded into it. On top of that it has the ability to emit the leadership auras of the Commissar while he's loaded inside of it, making it a decent little safety-bus for your angry man with a big hat. An early game transport is nice to have for shipping your dudes around as quickly as possible but the Chimera doesn't really shine unless there's water breaking up the geometry of the map, giving you a semi-unique edge on such maps. The Flayed Ones are something of a Necron fan favourite, or at least so I've gathered. I personally prefer Canoptek Wraiths for the role of stealthy melee murder boys but the Necrons do well enough with this addition as a cheap tier one option to deal with their complete lack of melee infantry prior to the Triarch Praetorians. While I'm not certain they're worth the cost of needing to be researched, Flayed Ones make themselves useful on densely ruined or forested maps against sheltered infantry units, sneaking up on them and tearing them to pieces in CQB, unscathed with their ability to ignore overwatch attacks. The Razorback. Space Marine players have been wanting a low tier transport unit since the traitors got to call dibs on the Rhino with their launch roster to help with their general lack of mobility prior to drop pods, land raider and thunderhawk tiers of technology. Something of a monkey's paw the Razorback is TECHNICALLY a transport but only sports a whopping 2 slots and an anti-infantry turret. The upside to the Razorback is that it is very fast, able to travel over open terrain much, much faster than the infantry that it carries and faster than most other vehicles available to the Space Marines. The best use I've found for the Razorback is to transport the fragile Devastator Squad to the front lines to join a siege. The Scythed Hierodule is a much needed super heavy for the Tyranids. Terrifyingly fast and uncompromising in its ability to blender anything in its path the Hierodule rounds off the Tyranid's lategame roster as a game-ender, able to close the gap and tear apart armies with astonishing ease. The Tidewall Gunrig is a unit that looks like it fits in more with the Fortifications Pack but that came out before the Tau were released so here it is now. A mobile, hovering fortification with a single railgun, the Gunrig is a surprisingly useful addition to the Tau arsenal, lacking a reliable, long-range anti-armour option in the early game the Gunrig very neatly fills that niche for the boys in blue, able to be deployed anywhere from their versatile Builder Drones it provides long-range siege and fire support and shelter for their fragile troops, also functioning as a transport with an impressive 4 transport slots and requiring an infantry unit to be loaded to be able to move. Edit: The Gunrig has been nerfed int he tech tree so its no longer an early game unlock, on the same tier as the Hammerhead which it shares a main gun with. Its still very good with the abiltiy for builder drones to deploy them in a pinch and functioning as a transport as well as a siege platform. Warbikers effectively fill the same role as the Warbuggies but do it better. Speedy and mobile scout units with a relatively strong melee and short range machine-gun attack they effectively replace the little bug-bikes with the sole downside of needing to be researched while the Warbuggy comes with the vehicle structure by default. While being much more fragile than Warbuggies they're much faster and deal more damage, generally the deciding factor for hit-and-run units.