Orc Problem: Achievements Challenge Guide

The hard achievements are level challenges with restrictions — one tower, no abilities, only three types… Here's every one solved, plus the game's most famous achievement trick.

Last updated: Aug 22, 2026 · compiled from English and German Steam community guides

The challenge list

Level	1.1 — "One's Enough"
Rule	Survive with a single tower and no abilities
Level	2.1 — "Fine, I'll Do It Myself"
Rule	Survive without any towers
Level	3.1 — "Specialist"
Rule	Survive with only one type of tower, no abilities
Level	4.1 — "Elemental Carnage"
Rule	Only flamethrower, tesla coil, and cryo beam
Level	5.1 — "Triple Threat"
Rule	Survive with only three types of towers, no abilities
Level	6.1 — "Four Wins"
Rule	Survive with only four types of towers, no abilities
Level	6.2 — Perfect clear
Rule	Complete the level without taking damage

Achievement names translated from the German community guide; check your Steam language for exact titles.

1.1 — One tower

Works: a laser with a good bounce setup; a fully-upgraded machine gun; a flamethrower at high level; or a single tesla halfway up the right wall (community comment, zero leaks).

2.1 — No towers

No guide needed — it's an ability-macro test. Fully upgrade the missile tree (hotkey 1) and use your click abilities to survive: missile launcher, air strafe, nuke, cryo beam.

3.1 — One tower type

Works: high-level flamethrowers in the right spots; 4 maxed machine guns spawn-camping; or tesla-only walls (3 per entrance, 2 at the top/bottom wall by the defend point).

4.1 — Three specified types

Loadout: flamethrowers up front, teslas at the end for cleanup — basically AFK. Micro a cryo beam on anything threatening to leak; a flawless run isn't required.

5.1 — Three types, no abilities

Two proven builds:

German guide build: 13 gunners, 7 flamethrowers, 8 grenade launchers — all fully upgraded.
Bounce build: flamethrower + tesla + laser with a very specific laser bounce setup; take the flamethrower bonus-damage upgrade in the tech tree. Tesla placement matters for stragglers.

6.1 — Four types, no abilities

Loadout: flamethrower + smoke grenade + tesla + laser, with a specific laser bounce system. Smoke/gas grenades are critical CC; expect a win within ~3 attempts. Alternative: gunners, flamethrowers, teslas, and grenade launchers layered in that order on the chokes.

The 666k nuke trick

The achievement requires dealing 666,000 damage with a single nuke. The community method:

Cryo wall: continuously wall off a spawn point with the cryo beam until you're out of fuel, stacking the whole wave, then drop the nuke before the wall melts. Works even with a level 1 nuke.
Alternative (5.1): flamethrowers along the top edge of the volcano with the burn damage boost, grenade launchers to slow the crowd, teslas for stragglers — then a fully-upgraded nuke at the top of the volcano. Dedicate a run to it.

Source noteCompiled from the English challenge guide by [PPR] itsuno, plant4's strategy guide, Kozer's hard-achievement guide, and the German rare-achievements guide (eMule). Setup screenshots in the original guides show exact placements.

FAQ

Do the challenges need a maxed tech tree?

Nearly — the guides assume near-complete upgrades (except a few final ice-beam upgrades).

Does 6.2 allow abilities?

Yes — the restriction is taking no damage, not using no abilities.

Is there an easy achievement order?

1.1 → 3.1 → 4.1 → 5.1 → 6.1 → 6.2, with the 666k nuke farmed on a dedicated run whenever convenient.

Are the achievement names different in my language?

Yes — the names above are translated; the level+rule table is what actually matters.