Xenonauts 2 rewards players who understand how their soldiers grow. Every stat on your squad has a specific training loop, every rank unlocks a tangible squad-wide bonus, and 8 medals are sitting there waiting to hand each soldier a permanent +1 to all attributes. If you're sending troops into UFO crashsites without knowing any of this, you're leaving serious stat gains on the table.
What are the six soldier attributes in Xenonauts 2?
According to the official Xenonauts 2 wiki, every soldier carries six core attributes. Each one does something distinct, and each one levels through a different in-battle action.

Soldier attribute overview panel
The practical takeaway here is that Health is entirely passive. You can't grind it directly. Every time another attribute goes up, Health gains 200 Progress Points automatically. Focus on the other five and Health follows.
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Reflexes advance from unused TU at the end of your turn. Soldiers who end turns in overwatch or simply conserve movement will quietly build Reflexes faster than those who sprint every action.How does attribute advancement actually work?
Each attribute needs 1,000 Progress Points to gain +1. You can earn a maximum of 2,000 Progress Points per attribute per battle, which caps you at +2 per stat per mission under normal conditions. Killing an enemy grants +200 Progress Points to all attributes simultaneously, so aggressive soldiers who secure kills develop faster across the board.
The system stays generous up to +5 in any given attribute, then diminishing returns kick in. According to the official wiki, the cost schedule looks like this:
The jump from 2,000 to 3,000 at the +26 threshold is steep. Spreading development across multiple attributes is more efficient than pushing any single stat deep into the high-cost range, especially early in a campaign.
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Hovering over a stat number in the soldier screen shows the base value plus all active bonuses and penalties. Always check this before assuming a soldier's raw attribute is their effective value.
What ranks can soldiers reach and why does it matter?
Rank in Xenonauts 2 is a direct function of total stat increases earned across all attributes. The soldier with the highest rank in any combat mission becomes the Mission Commander, and their rank directly affects every other soldier's Bravery during morale checks and psionic defence checks.
The rank ladder, as documented in the official wiki, runs as follows:
A Private leading your squad imposes a -10 Bravery penalty on everyone during morale checks. A Colonel gives the whole team +20. That's a 30-point swing in squad-wide morale resilience, which matters enormously on terror site missions where suppression and psionic attacks pile up fast.
Getting at least one soldier to Sergeant (17 stat-ups) as quickly as possible removes the default negative modifier from your early campaigns. Sergeant Major and above start generating genuine positive returns.
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If you rotate soldiers frequently, nobody accumulates stat-ups fast enough to reach the high ranks. Keeping a core squad of regulars who deploy often is the most reliable path to getting a Colonel-rank commander.
How do you earn medals and what do they give you?
Medals are automatic awards that trigger when a soldier meets specific career milestones. Each medal grants +1 to all six attributes, and with 8 medals available per soldier, that's a potential +8 across every stat purely from milestone play. According to the official wiki, the full medal list is:

All eight soldier medals listed
The first three medals come naturally from progressing through the campaign's mission types. The Distinguished Service Medal requires 10 missions on a single soldier, so consistent deployment matters. The Crux Solaris and Golden Star both reward aggressive soldiers who rack up kills.
The Gallantry Citation is the awkward one. Taking 50% casualties in a mission is a bad outcome by any measure, but the medal still drops if you survive it. Don't deliberately throw soldiers into danger for this, but if a mission goes badly wrong and half your squad goes down, at least the survivors walk away with a permanent stat bonus.
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The Crimson Heart requires 30 HP damage in a single mission, not across a career. Soldiers who take a serious hit and survive earn this automatically. There's no need to engineer it.
Building your squad around the progression system
After testing the progression loops across multiple mission types, a few patterns stand out. Accuracy advances fastest when soldiers spend TU actively shooting, so assault-role soldiers naturally develop it without any extra thought. Reflexes, on the other hand, require discipline: soldiers need to stop moving and end turns with spare TU, which runs against the instinct to use every action available.

Soldier loadout and carry weight
Strength's training condition is specific enough to be easy to miss. The +10 Progress Points per movement TU only applies when the soldier is carrying over 80% of their maximum carry weight. Running a light loadout is tactically efficient but stunts Strength growth. For soldiers you want to develop into grenade specialists or heavy weapon carriers, packing them out deliberately pays off over time.
For new players getting started with the broader game systems, browse more guides on GAMES.GG to get up to speed on base management, research priorities, and interception before your first alien base assault.
The rank system creates a natural incentive to field the same soldiers repeatedly rather than rotating a large roster. A Colonel-rank commander giving the whole squad +20 Bravery on a terror site is a meaningful tactical advantage. Building toward that requires consistent deployment of your best performers, accepting that newer recruits will spend longer at the lower ranks.
With 8 medals available and each one adding +1 to all attributes, a fully decorated soldier who has also hit the natural progression ceiling on multiple stats becomes considerably more capable than a fresh recruit. The system rewards patience and consistent play over trying to rush any single soldier to a specific threshold.

