BTD 1 Strategy Guide: Best Towers, Upgrades, and Round-by-Round Tips

BTD 1 basics in 60 seconds

• You have 5 tower types: Dart Monkey, Tack Tower, Ice Tower, Bomb Tower, Super Monkey.
• Bloons follow a fixed path. If a bloon reaches the end, you lose lives.
• You earn cash by popping bloons. Spend it on new towers or upgrades between waves.
• The game has 50 rounds. Round 50 is the final wave—survive it to win.
• Sharp damage (darts, tacks) fails against black and lead bloons. Bombs (and a maxed Super Monkey) fix that.

Ready to play? Open BTD 1 in your browser and follow the phases below. New to the series? See which BTD to play first.

Know your bloons

BTD 1 introduces balloon types gradually. Plan counters before they appear—not when lives are already dropping.

Rule of thumb: Darts and tacks carry you through mid-game. Bombs are mandatory once blacks and leads show up in force.

Best towers ranked (for winning BTD 1)

1. Dart Monkey — S-tier (your backbone)

Cheap, strong upgrades, works on almost every non-black/lead wave. You will build many of these.

2. Bomb Tower — S-tier (required)

Not optional for a full clear. Pops blacks and leads that shut down your dart stacks cold.

3. Tack Tower — A-tier (corners only)

Devastating on bends and intersections where tacks hit the path multiple times. Weak on straightaways.

4. Ice Tower — B-tier (support)

Slows groups so darts and tacks clean up. Never rely on ice alone against white bloons.

5. Super Monkey — A-tier (late luxury)

Expensive but stabilizes messy rounds. Buy after core defense exists, not before round 20.

Best upgrades by tower

BTD 1 upgrade paths are linear. Prioritize damage-per-dollar early; save splash for when immunities appear.

Dart Monkey upgrade order

1. Faster darts — more pops per second, pays off immediately.
2. Piercing darts — hits multiple layers; huge on grouped colors.
3. Triple shot — late-game DPS spike; worth it on your best-placed dart.

Upgrade one strong dart at a time rather than spreading thin upgrades across four weak ones.

Tack Tower upgrade order

1. Faster shooting
2. More tacks (if available in your version)
3. Ring of fire — capstone for corner placements

Ice Tower upgrade order

1. Larger freeze radius — catch more bloons per pulse.
2. Longer freeze duration
3. Absolute zero — luxury; only after bombs are online.

Bomb Tower upgrade order

1. Bigger bombs — reliable splash.
2. Cluster bombs / missile launcher — when you can afford them.

Place bombs where bloons bunch up after a turn—one bomb, many pops.

Super Monkey upgrade order

1. Plasma vision
2. Sun god
3. True sun god — endgame flex if economy allows.

Placement rules that win games

• Dart Monkeys: on straight segments with long line-of-sight; stack 2–3 on hot lanes.
• Tack Towers: only on sharp corners or U-turns—never alone on a straight line.
• Ice Towers: just before a clustered dart/tack zone so frozen bloons sit in damage range.
• Bomb Towers: after tight turns where bloons stack; one well-placed bomb beats two misplaced ones.
• Super Monkey: central coverage—where its range overlaps the longest path section.
• Cover the whole track: no dead zones; leaks usually mean one uncovered bend.

Round-by-round phases (1–50)

Exact bloon counts vary slightly by version, but these phases match how BTD 1 difficulty ramps. Use them as a checklist each run.

Rounds 1–10: Establish economy

Goal: affordable coverage without overspending.

• Round 1–3: Place 1–2 Dart Monkeys on the longest straight path. Start waves when ready—no need to rush.
• Round 4–6: Add a Tack on the sharpest corner if you have one. Otherwise, second dart on weak coverage.
• Round 7–10: Upgrade your main dart to Faster Darts. Add a third dart only if you see leaks.

Do not buy: Ice, Bomb, or Super yet. You do not need them for basic colors.

Rounds 11–20: Upgrade your core

Goal: piercing damage before waves get dense.

• Push Piercing Darts on your best dart monkey.
• Add Tack on any second strong corner.
• If pink-speed bloons leak, add one more dart or upgrade attack speed—do not panic-buy ice yet.
• Bank a little cash; black bloons appear in this band on many runs—have ~$500+ ready for a bomb.

Rounds 21–30: Bring the bomb online

Goal: hard counter to black (and soon lead).

• Before round 21: place at least one Bomb Tower on a stacked turn.
• Continue upgrading your primary dart (Triple Shot when affordable).
• Optional: one Ice Tower before a dart cluster to slow pinks and grouped colors.
• If you leak blacks, the bomb is misplaced or too late—fix placement before upgrading bombs further.

Rounds 31–40: Stabilize mixed waves

Goal: sharp + explosive coverage on the same path.

• Second bomb only if blacks/leads come from two angles or one bomb cannot reach stacks.
• Maximize dart DPS on your best two spots.
• Ice upgrade radius if bloons escape frozen zones too often.
• Start saving for Super Monkey if lives are stable (200+ lives cushion).

Rounds 41–49: Late-game power

Goal: survive dense mixed rushes.

• Place Super Monkey in central range if you have the cash.
• Upgrade bomb splash (cluster/missile tier).
• Avoid selling towers—you lose more than you gain unless fixing a clear mistake.
• Use ice to bail out pink/leak waves while bombs reload on grouped blacks/leads.

Round 50: Final wave

Goal: survive the last rush with everything online.

• Enter with bombs + upgraded darts + (ideally) Super Monkey.
• Do not buy new towers mid-wave unless the game allows pausing between rounds—prep on round 49.
• If struggling, replay from round 30 with earlier bomb timing—that fixes most failed round-50 runs.

Beating black & lead bloons

Why your darts stop working

Black and lead bloons ignore sharp projectiles. A maxed dart stack will watch them cruise by. That is working as designed—not a bug.

Fix checklist

1. Place a Bomb Tower where bloons clump (after corners).
2. Time ice before the bomb zone so stacks stay tight.
3. Add Super Monkey only if bombs are already popping blacks reliably.
4. Never sell all sharp towers—colors and pinks still need darts/tacks.

Common mistakes (and fixes)

• Maxing one dart before buying coverage — Fix: two modest darts beat one over-upgraded dart early.
• Tack on a straight line — Fix: move tacks to corners only.
• Ice as your only defense — Fix: pair ice with darts; whites ignore freeze.
• No bomb before round 25 — Fix: save earlier, buy bomb by round 20–21.
• Super Monkey before bombs — Fix: bombs first, super monkey is luxury.
• Ignoring a path segment — Fix: walk the track each round; leaks show the gap.

FAQ

What is the best tower in BTD 1?

Dart Monkey is the best overall tower for cost and upgrades. Bomb Tower is equally important because it is the reliable black/lead answer.

How many rounds are in BTD 1?

There are 50 rounds. Clearing round 50 completes the game.

Can I beat BTD 1 without Super Monkey?

Yes. Many players beat all 50 rounds with darts, tacks, ice, and bombs only. Super Monkey makes late rounds easier but is not required.

Should I place many tack towers?

Only on strong corners. Three tacks on bad spots are worse than one tack on a great corner plus darts on straights.

What should I play after beating BTD 1?

Move to BTD 2 for new towers and pink/black pressure, or jump to BTD 5 for the fan-favorite classic. See our full series timeline.