No missable achievements (plus 15 unknown)
Sign in with Steam or Xbox to track your progress, and:
Complete the three first levels on campaign mode, obtaining nine stars.
Switch position between two units.
Resist a suicide explosion with your Selknam tank preventing your allies death.
Raise a complete class of Selknams to level 3 (archers, bowlers, warriors or mages).
Sell a unit that is almost dead.
Reach at least eight buffed selknams at the same time.
Pass one of the level from second world and above, on triple speed.
Unblock the survival mode.
Kill five enemies using only poison.
Confuse, stun and catch with a network the same enemy.
Raise all units to level 3.
Beat the 7 minutes and 29 seconds on survival mode.
You found a crude reality.