Mentium · Wiki
Economy & chests
How coins and Mentis flow in and out. Chests, daily ads, swaps and premium upgrades.
Daily rewarded ads
| Type | Reward | Daily limit |
|---|---|---|
| Coins | +50  | 3 |
| Mentis | +5  | 1 |
| Lives (1st) | +6  | — |
| Lives (2nd) | +4 | — |
| Lives (3rd+) | +2 | 3 total/day |
| Double reward | x2 at end of match | Unlimited (if ad available) |
Welcome pack
When you create your account you automatically receive 1,000 + 25 and 5 starting lives.
Mentis → Coins swap
| Cost | Receive | Rate ( per ) |
|---|---|---|
| 3 | 1,000 | 333 |
| 7 | 3,000 | 429 |
| 18 | 10,000 | 556 |
| 30 | 20,000 | 667 |
Tip: larger packs give a better rate. If you're going to swap Mentis for coins, batch the swap into 18s or 30s.
Premium upgrades (with Mentis)
| Upgrade | Cost | Duration |
|---|---|---|
| Remove ads (forever) | 500 | Permanent |
| Double XP 24h | 20 | 24 hours |
| Streak Shield 7 days | 15 | 7 days |
Chest system
Up to 4 simultaneous chests. Only the first one has its timer running: the rest queue up and start their timer once the previous one is removed. If a fifth chest arrives while your slots are full, it's discarded — clear a slot before playing another high-scoring match.
Notebook
30 min
Book
3 h
Tome
8 h
Scroll
16 h
Relic
24 h
Reward table per chest
Coin and Mentis values post-rebalance May 2026 (×10 over the 1.0 Curie figures).
| Chest | Time | Instant cost | Clicks | Coins | Mentis | Avatar |
|---|---|---|---|---|---|---|
| NOTEBOOK | 30 min | 3 | 5 | 50–150 | 1–2 | 8% |
| BOOK | 3 h | 6 | 8 | 120–300 | 1–3 | 20% |
| TOME | 8 h | 12 | 12 | 250–550 | 2–5 | 32% |
| SCROLL | 16 h | 20 | 16 | 450–850 | 3–8 | 52% |
| RELIC | 24 h | 30 | 20 | 750–1,400 | 5–13 | 75% |
Beyond coins, Mentis and avatars, chests can also drop lives (probability rising from 20% in NOTEBOOK to 80% in RELIC, only if you're below max), plus phone calls and 50/50 lifelines in growing amounts. Scroll and Relic can also include the unlock of a premium category (15% and 35% respectively).
Instant-open cost (decreasing)
The Mentis cost to open an active chest scales down with the time remaining: a Scroll (base 20
) with 4 h left out of the original 16 only costs 5
. Chests in the queue (timer not started) always pay the base price —
no discount because no time has been "spent".
Free alternative: open by clicks when ready. Tap the chest the indicated number of times (5 to 20 by type) to open it without spending Mentis.
Daily chest
Every 12 hours you get a free one if you have a slot. The type is rolled with a bias toward smaller chests:
| Chest | Probability |
|---|---|
| NOTEBOOK | 50% |
| BOOK | 35% |
| TOME | 12% |
| SCROLL | 3% |
| RELIC | 0% (never in daily) |
Important: if your chest queue is full (4/4) when the daily fires, it's lost. Empty a slot first to keep it.
Post-match chests
Every match can drop a chest. The probability and type depend on the mode and accuracy. In hard AI modes (VETERAN+) at 100% accuracy, up to 65% of matches drop a chest, with 20% of those drops being a RELIC outright. In Classic at 100%, the drop rate is 40% with 5% RELIC. Below 60% accuracy, no chest.
| Mode | Accuracy | P(chest) |
|---|---|---|
| Hard AI (VETERAN+) | 100% | 65% |
| Hard AI | 80–99% | 50% |
| Hard AI | 60–79% | 30% |
| Easy AI (RECRUIT/SOLDIER) | 100% | 50% |
| Easy AI | 80–99% | 35% |
| Easy AI | 60–79% | 20% |
| Classic | 100% | 40% |
| Classic | 80–99% | 25% |
| Classic | 60–79% | 15% |
| Any | <60% | 0% |
Avatars in chests
Avatars are an extra bonus on top of the main loot, with rising probability per chest. Only locked avatars are rolled: if you already have every avatar in a tier, that tier is automatically skipped. SECRET avatars never drop from chests — they're only earned by completing specific achievements.
| Chest | P(avatar) | Tier distribution |
|---|---|---|
| NOTEBOOK | 8% | 100% RARE |
| BOOK | 20% | 10% PREMIUM · 90% RARE |
| TOME | 32% | 25% PREMIUM · 75% RARE |
| SCROLL | 52% | 8% EPIC · 27% PREMIUM · 65% RARE |
| RELIC | 75% | 15% EPIC · 35% PREMIUM · 50% RARE |
Strategy: the daily chest is the guaranteed avatar source for casual players (~3 RARE/month from NOTEBOOKs alone). If you want EPIC avatars fast, play hard AI modes at 100% — Scroll and Relic are the only fast route.
Shop and in-app purchases
Mentis packs
| Pack | Mentis |
|---|---|
| Handful | 50 |
| Bag | 150 |
| Chest | 350 |
| Trunk | 750 |
| Treasure | 1750 |
Other products
- Remove ads (with Mentis): 500 , permanent.
- Direct chests: price = instant-open by chest type.
- Individual lifelines: 50/50 (50 ) and Phone Call (2 ).
- Premium topic unlock: 30 (also via chests and achievements).
Senda Mentium · Rewards pass
Tap to enlarge New in 2.0 "Einstein": a visual progression pass, battle-pass style, with 100+ levels. You level up by playing (XP curve is linear up to 30, flat after that). Each level grants rewards in two parallel tracks:
- Free track: coins, Mentis, lives, lifelines, milestone chests and exclusive cosmetics (avatars, banners, frames and titles at levels 5/10/25/50/75/100).
- Premium track (
level_path_premium_s1, €4.99): extra rewards at every level plus premium-exclusive cosmetics at each milestone of 25 (4 avatars + 4 frames + 5 banners only available in the premium pass).
It's a non-consumable purchase: pay once, keep your pass progress forever, and every level you claim stays on your account. The premium track is not pay-to-win: every gameplay unlock (categories, modes) sits on the free track; premium is cosmetics + extra currency.
Migration: existing players who upgraded to 2.0 "Einstein" can manually claim every level 1..N they had already passed in 1.0 "Curie" (the auto-claim is intentionally disabled so the progression ritual stays visible).
Our promise: purchases are never required. Every upgrade can be earned by playing.